A short bar magnet placed with its axis at 30 with an external field of 800 G experience a torque of Physics with Gaurav 25,5 тыс. подписчиков Скачать
A short bar magnet placed with its axis at 30 with an external field of 800 G experience a torque of Скачать
In Fig. 5.4(b), the magnetic needle has magnetic moment 6.7*10-2 Am2 and moment of inertia I = 7.5 Скачать
A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in Скачать
In Exercise 4.11obtain the frequency of revolution of the electron in its circular orbit. Does the Скачать
In a chamber, a uniform magnetic field of 6.5 G ( 1G = 10-4 T) is maintained. An electron is short Скачать
A closely wound solenoid 80cm long has 5 layers of windings of 400 turns each. The diameter of the Скачать
Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direct Скачать
A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. Скачать
What is the magnitude of the magnetic force per unit length on a wire carrying a current of 8 A Скачать
A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Скачать
A long straight wire carries a current of 35 A. What is the magnitude of field B at a point 20 cm Скачать
A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. Скачать
A current-carrying circular loop lies on a smooth horizontal plane. Can a uniform magnetic field be Скачать
A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 A. (a) what is the Скачать
The horizontal component of earths magnetic field at a certain place is 3.0*10^-5 T and the directio Скачать
A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of Скачать
Figure 4.15 shows a long straight wire of a circular cross-section ( radius a) carrying steady curre Скачать
Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magni Скачать
A straight wire carrying a current of 12A is bent into a semi-circular arc of radius 2.0 cm as shown Скачать
An element dl = da i is placed at the origin and carries a large current I = 10A ( Fig. 4.10). What Скачать
A cyclotron’s oscillator frequency is 10 MHz. What should be the operating magnetic field for accele Скачать
What is the radius of the path of an electron ( mass 9.1 * 10^ -31 kg and charge 1.6 * 10 ^-19 C) Скачать
If the magnetic field is parallel to positive y axis and the charged particle is moving along the Скачать
A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air Скачать
Figure 3.34 shows a 2.0 V potentiometer used for the determination of internal resistance of a 1.5 V Скачать
Figure 3.33 shows a potentiometer with a cell of 2.0 V and internal resistance 0.40 ohm maintaining Скачать
Determine the current drawn from a 12 V supply with internal resistance 0.5 ohm by the infinite netw Скачать
Given n resistors each of resistance R, how will you combine them to get the (i) maximum (ii) minimu Скачать
A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantiti Скачать
What conclusion can you draw from the following observations on a resistor made of alloy manganin Скачать
Two wires of equal length, one of aluminium and the other of copper have the same resistance. Which Скачать
Six lead-acid type of secondary cells each of EMF 2.0 V and internal resistance 0.015 ohm are joined Скачать
The earth’s surface has a negative charge density of 10 ^-9 C m^-2. The potential difference of 400 Скачать
The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 * 10^28 m Скачать
In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35.0 cm length of wire Скачать
A storage battery of emf 8.0 V and internal resistance 0.5 ohm is being charged by a 120 V dc suppl Скачать
In a meter bridge fig. 3.27 , the balance point is found to be at 39.5 cm from the end A, when the Скачать
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which Скачать
A silver wire has a resistance of 2.1 ohm at 27.5 •C and resistance of 2.7 ohm at 100 •C. Determine Скачать
A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6*10^-7 Скачать
At a room temperature (27 •C) the resistance of a heating element is 100 ohm. What is the temperatur Скачать
Three resistors 2 ohm, 4 ohm and 5 ohm are combined in parallel, what is the total resistance of the Скачать
Three resistors 1 ohm , 2 ohm, and 3 ohm are connected in series, what is the total resistance of Скачать
A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor. If the current in Скачать
The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Скачать
A resistance of R ohm draws current from a potentiometer. The potentiometer has a total resistance R Скачать
In a meter bridge (Fig 3.27), the null point is found at a distance of 33.7 cm from A. If now a resi Скачать
The four arms of Wheatstone bridge (Fig. 3.26) have the following resistances; AB = 100 ohm, BC = 10 Скачать
What is the acceleration of the block and the trolley system shown in Fig. 5.12(a), if the coefficie Скачать
A battery of 10 V and negligible internal resistance is connected across the diagonally opposite cor Скачать
See fig. 5.11. A mas of 4 kg rests on a horizontal plane. The plane is gradually inclined until at Скачать
Determine the maximum acceleration of the train in which a box lying on its floor will remain statio Скачать
A network of resistors is connected to a 16 V battery with internal resistance of 1 ohm as shown in Скачать
The resistance of the platinum wire of a platinum resistance thermometer at ice point is 5 ohm and Скачать
An electric toaster uses nichrome for its heating element. When a negligibly small current passes Скачать
In a example 3.1, the electron drift speed is estimated to be only a few mm/s for current in the….. Скачать
Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 1 Скачать
The top of the atmosphere is at about 400 KV with respect to the surface of the earth, corresponding Скачать
A small sphere of radius r1 and charge q1 is enclosed by a spherical shell of radius r2 and charge q Скачать
In a Van de Graaff generator a spherical metal shell is to be a 15 *10^6 V electrode. The dielectric Скачать
Describe schematically the equipotential surfaces corresponding to (a) a constant electric field in Скачать
A parallel plate capacitor is to be designed with a voltage rating 1 kV, using a material of dielect Скачать
A cylindrical capacitor has two co-axial cylinder of length 15 cm and radii 1.5 cm and 1.4 cm. The.. Скачать
Exercise 2.31Ans carefully : (a) Two large conducting sphere carrying charges Q1 and Q2 are brought Скачать
A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The Скачать
A spherical capacitor consists of two concentric spherical conductors held in position by suitable Скачать
Show that the force on each plate of a parallel plate capacitor has a magnitude equal to 1/2QE, Скачать
A 4 uF capacitor is charged by a 200 V supply. It is then disconnected from the supply, and connect Скачать
The plates of a parallel plate capacitor have an area of 90 cm^2 each and are separated by 2.5 mm. Скачать
Obtain the equivalent capacitance of the network in Fig. 2.35. For a 300 V supply. Determine the Скачать
What is the area of the plates of 2 F parallel plate capacitor, given that the separation between pl Скачать
The period of oscillation of simple pendulum is T = 2pie(L/g)^1/2. Measured value of L is 20.0 cm Скачать
An electrical technician requires a capacitance of 2 uf in a circuit across a potential difference Скачать
The length, breadth and thickness of a rectangular sheet of metal 4.324 m, 1.005 m, and 2.01 cm resp Скачать
Figure 2.34 shows a charge array known as an electric quadrupole, obtain the dependence of potential Скачать
Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side Скачать
Two charges -q and +q are located at points (0, 0, -a) and (0, 0, a), respectively. (a) What is the Скачать
Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the Скачать
If one of the two electrons of a H2 molecule is removed, we get a hydrogen molecule ion H2+ . In the Скачать
In a hydrogen atom, the electron and proton are bound at a distance of about 0.53 A: (a) Estimate Скачать
A long charged cylinder of linear charged density is surrounded by a hollow co-axial conducting Скачать
Show that the normal component of electrostatic field has a discontinuity from one side of a charged Скачать
A spherical conducting shell of inner radius r1 and outer radius r2 has a charge Q. (a) A charge q Скачать
Two tiny spheres carrying 1.5 uC and 2.5 uC are located 30 cm apart. Find the potential and elect Скачать
A cube of side b has a charge q at each of the vertices. Determine the potential and electric field Скачать
A charge of 8 mC is located at the origin. Calculate the work done taking a small charge of-2*10^-9C Скачать
A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is conn Скачать
A 12 pF capacitor is connected to a 50 V battery. How much electrostatic energy is stored in the cap Скачать
Explain what would happen if in the capacitor given in Exercise 2.8, a 3 mm thick mica sheet ( of di Скачать
In a parallel plate capacitor with air between the plates, each plate has an area of 6*10^-3 m^2 and Скачать
Three capacitor of capacitance 2 pF, 3 pF and 4 pF are connected in parallel. (a) What is the total Скачать
Three capacitors each of capacitance 9 pF are connected in series. (a) what is the total capacitance Скачать
A parallel plate capacitor with air between plates has a capacitance of 8 pF ( 1pF = 10^-12 F). What Скачать
A spherical conductor of radius 12 cm has a charge of 1.6*10^-7 C distributed uniformly on its surfa Скачать
Two charges 2uC and -2 uC are placed at points A and B 6 cm apart. (a) identity an equipotential Скачать
A regular hexagon of side 10 cm has a charge 5 uC at each of its vertices. Calculate the potential Скачать
Two charges 5*10^-8 C and-3*10^-8 C are located 16 cm apart. At what distance point(s) on the line Скачать
A 900 pF capacitor is charged by 100 V battery fig 2.3 a. How much electrostatic energy is stored by Скачать
A network of four 10 uF capacitors is connected to a 500 V supply, as shown in fig. 2.29. Determine Скачать
A slab of material of dielectric constant K has the same area as the plates of a parallel-plate caps Скачать
A comb run through one’s dry hair attracts small bits of paper why? What happens if the hair is wet Скачать
A molecule of a substance has a permanent electric dipole moment of magnitude 10^-29 C m. A mole of Скачать
Determine the electrostatic potential energy of a system consisting of two charges 7 uC and -2 uC Скачать
Figure 2.8 (a) and (b) show the field lines of a positive and negative point charge respectively Скачать
Two charges 3*10^-8 C and -2*10^-8 C are located 15 cm apart. At what point on the line joining the Скачать
See Fig. 5.8. A mass of 6 kg is suspended by a rope of length 2 m from the ceiling. A force of 50 N Скачать
Two identical billiard balls strike a rigid wall with the same speed but at different angles and get Скачать
Suppose that the particle in Exercise 1.33 is an electron projected with velocity vx = 2.0*10^6 m/s. Скачать
A particle of mass m and charge (-q) enters the region between the two charged plates initially movi Скачать
Consider an arbitrary electrostatic field configuration. A small test charge is placed at a null poi Скачать
It is now believed that protons and neutrons (which constitute of ordinary matter) are themselves Скачать
Obtain the formula for the electric field due to long thin wire of uniform density E without using Скачать
A hollow charged conductor has a tiny hole cut into its surface. Show that the electric field in the Скачать
A conductor A with a cavity as shown in Fig. 1.36(a) is given a charge Q. Show that the entire charg Скачать
In a certain region of space, electric fields is along z-direction throughout. The magnitude of Скачать
Which among the curves shown in Fig 1.35 cannot possibly represent electrostatic field lines? Скачать
An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55*10^4 N Скачать
A batsman hits back a ball straight in the direction of bowler without changing its initial speed of Скачать
The motion of a particle of mass m is described by y = ut + 1/2gt^2. Find the force acting on the Скачать
A bullet of mass 0.04 kg moving with a speed of 90 m/s enters a heavy wooden block and is stopped Скачать
An astronaut accidentally gets separated out of his small spaceship accelerating in inter stellar Скачать
Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates Скачать
An infinite line charge produces a field of 9*10^4 N/C at a distance of 2 cm.calculate the linear ch Скачать
A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the cent Скачать
A point charge causes an electric flux of-1.0*10^3 Nm2/C to pass through spherical Gaussian surface Скачать
A point charge of 20 uC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net Скачать
Show that for a projectile the angle between the velocity and the x-axis as a function of time is Скачать
A cyclist is riding with speed of 27 km/h. As he approaches a circular turn on the road of radius 80 Скачать
A point charge +10 uC is a distance 5 cm directly above the centre of square of side 10 cm, as shown Скачать
Careful measurement of the electric field at the surface of a black box indicates that the net outwa Скачать
What is the net flux of the uniform electric field of Exercise 1.15 through a cube of side 20 cm our Скачать
A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly Скачать
A bullet fired at an angle of 30 with the horizontal hits the ground 3.0 km away. By adjusting its Скачать
Can you associate vectors with (a) the length of wire bent into a loop (b) plane area (c) a sphere? Скачать
A vector has both magnitude and direction. Does it mean that anything has magnitude and direction is Скачать
A vector has both magnitude and direction. Dose it have location in space? Can it vary with time? Wi Скачать
An aircraft flying at a height of 3400 m above the ground. If the angle subtended at a ground observ Скачать
Read each statement below carefully and state, with reasons and examples, if it is true or false A s Скачать
Consider a uniform electric field E = 3*10^3 I N/C. (a) what is the flux of this field through a sq Скачать
Figure 1.33 shows tracks of three charged particles in a uniform electrostatic field. Give the signs Скачать
Suppose the spheres A and B in Exercise 1.12 have identical sizes. A third sphere of same size but Скачать
Two insulated charged copper sphere A and B have their centres separated by a distance of 50 cm. Скачать
i and j are unit vectors along x and y axis respectively. What is the magnitude and direction of the Скачать
A particle starts from the origin at t = 0 s with a velocity of 10.0 j^ m/s and moves in x-y plane Скачать
An electric dipole with dipole moment 4*10^-9 C m is aligned at 30 degree with the direction of a Скачать
A system has two charges qa = 2.5 * 10^-7 C and qb = -2.5 *10^-7 C located at points A : (0,0,-15) Скачать
Two point charges qa= 3uC and qb = -3uC are located 20 cm apart in vacuum. (a) What is the electric Скачать
An electrostatic field line is a continuous curve. That is a field line cannot have sudden breaks, Скачать
Four point charges was qa = 2 uC, qb = -5 uC , qc = 2 uC and qd = -5 uC are located at the corners Скачать
When a glass rod is rubbed with the silk cloth, charges appear on both. A similar phenomenon is obse Скачать
(a) Explain the meaning of the statement “electric charge of a body is quantised”. (b) why we can Скачать
The position of a particle is given by r = 3.0 t i - 2.0 t2 j + 4.0 k m where t is in seconds and Скачать
The electrostatic force on a small sphere of charge 0.4 uC due to another small charge -0.8 uC in ai Скачать
What is the force between two small charged spheres having charges of 2*10^-7 C and 3*10^-7 C, place Скачать
Read each statement below carefully and state with reasons, if it is true or false (a) the magnitude Скачать
An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare Скачать
A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant Скачать
A cricketer can throw a ball to a maximum horizontal distance of 1000 m. How much high above the Скачать
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball is Скачать
In a harbour, wind is blowing at the speed of 72 km/h and the flag on the mast of a boat anchored in Скачать
An early model for an atom, considered it to have a positively charged point nucleus of charge Ze Скачать
An electric field is uniform, and in the positive x direction for positive x, and uniform with the Скачать
Two small particle of tungsten each weighing 10 mg and each carrying a charge of 10^-8 C are one cen Скачать
The electric field components in Fig 1.27 are Ex = ax1/2, Ey = Ez = 0, in which a = 800 N/Cm1/2. Cal Скачать
Two charges +- 10 uC are placed 5.0 mm apart. Determine the electric field at (a) a point P on the Скачать
Two point charges q1 and q2, of magnitude +10^-8 C and -10^-8 C respectively, are placed 0.1 m apart Скачать
An electron falls through a distance of 1.5 cm in a uniform electric field of magnitude 2.0*10^4 N/C Скачать
A man can swim with a speed of 4.0 km/h in still water. How long does he take to cross a river 1.0km Скачать
Rain is falling vertically with a speed of 30m/s. A woman rides a bicycle with a speed of 10 m/s in Скачать
On an open ground, a motorist follows a track that turns to his left by an angle of 60 after every Скачать
A passenger arriving in a new town wishes to go from the station to a hotel located 10 km away on a Скачать
Consider the charges q, q and -q placed at the vertices of an equilateral triangle, as shown in fig Скачать
A cyclist starts from the centre O of circular park of radius 1km, reaches the edge P of the park Скачать
Three girls skating on a circular ice ground of radius 200 m start from a point P on the edge of the Скачать
State with reasons, whether the following algebraic operations with scalar and vector physical quant Скачать
Consider the charges q, q, and -q placed at the vertices of an equilateral triangle, as shown in fig Скачать
Pick out the only vector quantity in the following list: temperature, pressure, impulse, time, power Скачать
Pick out the two scalar quantities, in the following list. Force, angular momentum, work, current Скачать
An insect trapped in a circular groove of radius 12 cm moves along the groove steadily and completes Скачать
Consider three charges q1, q2, q3, each equal to q at the vertices of an equilateral triangle of sid Скачать
A charged metallic sphere A is suspended by a nylon thread. Another charged metallic sphere B held Скачать
Coulomb’s law for electrostatic force between two point charges and Newton’s law for gravitational Скачать
A hiker stands on the edge of a cliff 490 m above the ground and throws stone horizontally with an Скачать
Galileo, in his book Two new sciences, stated that “ for elevations which exceed or fall short of 45 Скачать