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12th CBSE

IMPORTANT

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If two charged conductors are touched mutually and then separated, prove that the charges on them will be divided in the ratio of their capacitances.

Important Questions on Electrostatic Potential and Capacitance

MEDIUM

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 40

Two capacitors with capacity

C_{1}

and

C_{2}

are charged to potential

V_{1}

and

V_{2}

respectively and then connected in parallel. Calculate the common potential across the combination, the charge on each capacitor, the electrostatic energy stored in the system and the change in the electrostatic energy from its initial value.

MEDIUM

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 41

Explain why the polarization of a dielectric reduces the electric field inside the dielectric. Hence define dielectric constant.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 42

Define ‘dielectric constant’ of a medium. Briefly explain why the capacitance of a parallel plate capacitor increases, on introducing a dielectric medium between the plates.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 43

What is dielectric polarisation?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 44

Two dielectric slabs of dielectric constants $k_{1}$ and $k_{2}$ are filled in between the two plates, each of area $A$ , of the parallel plate capacitor as shown in Figure. Find the net capacitance of the capacitor.

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12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 46

Explain, using suitable diagrams, the difference in the behavior of a (i) conductor and (ii) dielectric in the presence of the external electric field. Define the term polarization of a dielectric and write its relationship with susceptibility.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 48

The charges $q_{1} = 3 μF, q_{2} = 4 μF$ and $q_{3} = - 7 μF$ are placed on the circumference of a circle of radius $1.0 m$ , as shown in Figure below. What is the value of charge $q_{4}$ placed on the same circle if the potential at centre, $V_{C} = 0$ ?

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EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 2 - Electrostatic Potential and Capacitance>Text Based Exercises>Q 49

Two thin concentric shells of radii

r_{1}

and

r_{2} (r_{2} ≫ r_{1})

have charges

q_{1}

and

q_{2}

. Write the expression for the potential at the surface of inner and outer shells.

If two charged conductors are touched mutually and then separated, prove that the charges on them will be divided in the ratio of their capacitances.

Important Questions on Electrostatic Potential and Capacitance

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