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 12 A is bent into a semi-circular arc of radius 2.0 cm as show 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
An element dl = dx i is placed at the origin and carries a large current I = 10 A (Fig. 4.8). What i Скачать
Motion Of Charged Particle in a Magnetic Field || Moving Charges and Magnetism || Physics Ncert Скачать
What is the radius of the path of an electron (mass 9 x 10-31 kg and charge 1.6 x 10-19 C) moving at Скачать
If the magnetic field is parallel to the positive y-axis and the charged particle is moving along th Скачать
Combination Of Cell | Series Combination Of Cell | Current Electricity Chapter 03 | Physics Ncert Скачать
Cell - EMF, Terminal voltage & internal resistance of cell | Chapter 03 Current Electricity | Ncert Скачать
The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 x 10²⁸ m³ Скачать
A storage battery of emf 8.0 V and internal resistance 0.5 is being charged by a 120 V dc supply Скачать
Kirchhoff's Law | Current & Voltage Rule | Chapter 03 Current Electricity | Class 12 Physics | Ncert 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 a resistance of 2.7 ohm at 100 °C. Determi Скачать
A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 x 1 Скачать
At room temperature (27.0 °C) the resistance of a heating element is 100 ohm What is the temperature Скачать
A battery of emf 10 V and internal resistance 3 2 is connected to a resistor. If the current in the Скачать
The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Скачать
The four arms of a Wheatstone bridge (Fig. 3.19) have the following resistances: ΑΒ = 100 BC = 10 Скачать
A battery of 10 V and negligible internal resistance is connected across the diagonally opposite cor Скачать
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The resistance of the platinum wire of a platinum resistance thermometer at the ice point is 5 ohm Скачать
An electric toaster uses nichrome for its heating element. When a negligibly small current passes th Скачать
In Example 3.1. the electron drift speed is estimated to be only a few mm s¹ for currents in the ran Скачать
Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area Скачать
A 600pF capacitor is charged by a 200V supply. It is then disconnected from the supply and is connec Скачать
A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capac Скачать
Explain what would happen if in the capacitor given in Exercise 2.8, a 3 mm thick mica sheet (of die Скачать
In a parallel plate capacitor with air between the plates, each plate has an area of 6 x 10-³m² and Скачать
Three capacitors of capacitances 2 pF, 3 pF and 4 pF are connected in parallel What is the total cap 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 the plates has a capacitance of 8 pF (1pF = 10-12 F). Wh Скачать
A spherical conductor of radius 12 cm has a charge of 1.6 × 10-⁷C distributed uniformly on its surfa Скачать
Two charges 2 μC and -2 µC are placed at points A and B 6 cm apart.(a) Identify an equipotential sur Скачать
A regular hexagon of side 10 cm has a charge 5 µC at each of its vertices. Calculate the potential a Скачать
Two charges 5 × 10‐⁸ C and -3 x 10-⁸C are located 16 cm apart. At what point(s) on the line joining Скачать
A 900 pF capacitor is charged by 100 V battery [Fig. 2.31(a)]. How much electrostatic energy is stor Скачать
A network of four 10 µF 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 capa 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 µc and -2 µc (a Скачать
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Four charges are arranged at the corners of a square ABCD of side d, as shown in Fig. 2.15.(a) Find Скачать
Figures 2.8 (a) and (b) show the field lines of a positive and negative point charge respectively. Скачать
Potential Energy Of a Dipole in an External Field | Electrostatic Potential And Capacitance | Ncert Скачать
Relation Between Electric Field and Potential | Potential Gradient | Class 12th Physics | Ncert Скачать
Two charges 3 x 10-⁸ C and -2 x 10-⁸ C are located 15 cm apart. At what point on the line joining th Скачать
Calculate the potential at a point P due to a charge of 4 × 10^-7 C located 9 cm away. (b) Hence ob Скачать
Potential Due to an Electric dipole | Electrostatic Potential And Capacitance | physics | Ncert 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 linea Скачать
A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 µC/m². 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 x 10³ Nm²/C to pass through a spherical Gaussian surf Скачать
A point charge of 2.0 µC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the ne Скачать
A point charge +10 µC is a distance 5 cm directly above the centre of a square of side 10 cm, as sho 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 1.14 through a cube of side 20 cm ori Скачать
Consider a uniform electric field E = 3 x 10^3 î N/C. (a) What is the flux of this field through a s Скачать
Figure 1.30 shows tracks of three charged particles in a uniform electrostatic field. Give the signs Скачать
Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. Wh Скачать
A polythene piece rubbed with wool is found to have a negative charge of 3 x 10-7 С.(a) Estimate the Скачать
An electric dipole with dipole moment 4 x 10^-9 C m is aligned at 30° with the direction of a unifor Скачать
A system has two charges qA = 2.5 x 10-7 C and qB = -2.5 x 10-7 C located at points A: (0, 0, -15 cm Скачать
Two point charges qA = 3 µC and qB = -3 µC are located 20 cm apart in vacuum.(a) What is the electri Скачать
An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks Скачать
Four point charges qA= 2 μC, qB = -5 µC, qc = 2 µC, and qD = -5 µC are located at the corners of a s Скачать
When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observ Скачать
Explain the meaning of the statement 'electric charge of a body is quantised (b) Why can one ignore Скачать
Check that the ratio ke²/G mm, is dimensionless. Look up a Table of Physical Constants and determin Скачать
The electrostatic force on a small sphere of charge 0.4 µC due toanother small sphere of charge Скачать
What is the force between two small charged spheres having charges of 2 x 10^-7C and 3 x 10^-7C plac Скачать
An early model for an atom considered it to have a positively charged point nucleus of charge Ze, su Скачать
An electric field is uniform, and in the positive x direction for positiye x, and uniform with the Скачать
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Example 1.10 Electric Charges And Fields || The electric field components in Fig. are Ex =ax½, Ey=Ez Скачать
Two charges ±10 µC are placed 5.0 mm apart. Determine the electric field at (a) a point P on the axi Скачать
Two point charges q₁ and q₂, of magnitude +10^‐8 C and -10^-8 C. respectively, are placed 0.1 m apar Скачать
Torque On a Dipole in a Uniform Electric Field | Electric Charges And Field | Class 12th | Ncert Скачать
An electron falls through a distance of 1.5 cm in a uniform electric field of magnitude 2.0 × 10⁴ Скачать
Consider the charges q, q, and -q placed at the vertices of an equilateral triangle, as shown in Fig Скачать
Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side Скачать
A Charged metallic sphere A is suspended by a nylon thread. Another charged metallic sphere B held b Скачать
Coulomb's law for electrostatic force between two point charges and Newton's law for gravitational f Скачать
If 10⁹ electrons move out of a body to another body every second, how much time is required to get a Скачать
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Quantization Of Charge | Conservation Of Charge | Electric Charges and Fields | Class 12th Physics Скачать
Figures correspond to two circular motions. The radius of the circle, the period of revolution, the Скачать
In Exercise 13.9, let us take the position of mass when the spring is unstreched as x = 0. and the Скачать
A spring having with a spring constant 1200 N m' is mounted on a horizontal tableas shown in Fig. Скачать
The motion of a particle executing simple harmonic motion is described by the displacement function, Скачать
A spring balance has a scale that reads from 0 to 50 kg. The length of the scale is 20cm. A body su Скачать
Which of the following relationships between the acceleration a and the displacement x of a particle Скачать
Which of the following functions of time represent (a) simple harmonic. (b) periodicbut not simple Скачать
A particle is in linear simple harmonic motion between two points. A and B. 10 cm apart. Take the di Скачать
Which of the following examples represent (nearly) simple harmonic motion and which represent period Скачать
a) A swimmer completing one (return) trip from one bank of a river to the other ( and back. ) A free Скачать
The triple-point of water is a standard fixed point in modern thermometry. Why? What is wrong in tak Скачать
A pan filled with hot food cools from 94 °C to 86 °C in 2 minutes when the room temperature is at 20 Скачать
An iron bar ( L1 = 0.1 m, A1= 0.02 m^2 , K1 = 79 wm^-1k^-1) and a brass bar ( L2 = 0.1m, A2 = 0.02 Скачать
What is the temperature of the steel-copper junction in the steady state of the system shown in Fig. Скачать
Calculate the heat required to convert 3 kg of ice at -12 °C kept in a calorimeter to steam at 100 ° Скачать
When 0.15 kg of ice at 0°C is mixed with 0.30 kg of water at 50°C in a container, the resulting temp Скачать
A sphere of 0.047 kg aluminium is placed for sufficient time in a vessel containing boiling water, s Скачать
A blacksmith fixes iron ring on the rim of the wooden wheel of a horse cart. The diameter of the rim Скачать
Show that the coefficient of area expansion, (AA/A)/AT, of a rectangular sheet of the solid is twice Скачать
Can Bernoulli's equation be used to describe the flow of water through a rapid in a river? Explain. Скачать
The angle of contact of mercury with glass is obtuse, while that of water with glass is acute.(b) Wa Скачать
The size of the needle of a syringe controls flow rate better than the thumb pressure exerted by a d Скачать
Water with detergent disolved in it should have small angles of contact.lel A drop of liquid under n Скачать
Explain why(a) To keep a piece of paper horizontal, you should blow over, not under, it (b) When we Скачать
Explain why(a) The blood pressure in humans is greater at the feet than at the brain (b) Atmospheric Скачать
A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter Скачать
Toricelli's barometer used mercury. Pascal duplicated it using French wine of density 984 kg m 3. De Скачать
A vertical off-shore structure is built to withstand a maximum stress of 10^9 Pa. Is the structure s Скачать
What is the excess pressure inside a bubble of soap solution of radius 5.00 mm,given that the surfac Скачать
What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature?Surface tensio Скачать
A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cro Скачать
Figure 9.21 (a) shows a thin liquid film supporting a small weight = 4.5 x 10^-2 N. What is the weig Скачать
A U-shaped wire is dipped in a soap solution, and removed. The thin soap film formed between the wir Скачать
The cylindrical tube of a spray pump has a cross-section of 8.0 cm² one end of which has 40 fine hol Скачать
Figures 9.20(a) and (b) refer to the steady flow of a (non-viscous) liquid. Which of the two figures Скачать
In a test experiment on a model aeroplane in a wind tunnel, the flow speeds on the upper and lower s Скачать
In the previous problem, if 15.0 cm of water and spirit each are further poured into the respective Скачать
A U-tube contains water and methylated spirit separated by mercury. The mercury columns in the two a Скачать
The lower end of a capillary tube of diameter 2.00 mm is dipped 8.00 cm below the surface of water i Скачать
The terminal velocity of a copper ball of radius 2.0 mm falling through a tank of oil at 20°C is 6.5 Скачать
A metal block of area 0.10 m² is connected to a 0.010 kg mass via a string that passes over an ideal Скачать
A fully loaded Boeing aircraft has a mass of 3.3 x 10^5 kg. Its total wing area is 500 m². It is in Скачать
In a car lift compressed air exerts a force F, on a small piston having a radius of 5.0 cm. This pre Скачать
Two syringes of different cross-sections (without needles) filled with water are connected with a ti Скачать