A parallel plate capacitor with square plates is filled with four dielectrics of dielectric constants K 1 , K 2 , K 3 , K 4 arranged as shown in the figure. The effective dielectric constant K will be:

K = K 1 K 2 K 1 + K 2 + K 3 K 4 K 3 + K 4

K = K 1 + K 2 K 3 + K 4 2 K 1 + K 2 + K 3 + K 4

K = ( K 1 + K 4 ) ( K 2 + K 3 ) 2 K 1 + K 2 + K 3 + K 4

K = K 1 + K 2 ( K 3 + K 4 ) K 1 + K 2 + K 3 + K 4

EASY

12th Gujarat Board

IMPORTANT

Earn 100

What is the angle between electric field and equipotential surface?

71.43% studentsanswered this correctly

Important Questions on Electrostatic Potential and Capacitance

MEDIUM

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 22

Two charges

2 μC

and

- 2 μC

are placed at points A and B

6 cm

apart.
(a) Identify an equipotential surface of the system. (b) What is the direction of the electric field at every point on this surface?

EASY

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 23

Describe schematically the equipotential surfaces corresponding to a single positive charge at the origin.

EASY

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 24

Describe schematically the equipotential surfaces corresponding to a field that uniformly increases in magnitude but remains in a constant (say,

z

) direction,

MEDIUM

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 25

30 μF

capacitor which is fully charged is connected to an inductor of

27 mH

value. Assuming that the charge initially on the capacitor is

6 mC

. Calculate the net energy stored initially in the circuit. Also, calculate the net energy at a later time.

HARD

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 26

4 μF

capacitor is charged by a

200 V

supply. It is then disconnected from the supply and is connected to another uncharged

2 μF

capacitor. How much electrostatic energy of the first capacitor is lost in the form of heat and electromagnetic radiation?

HARD

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 27

Show that the force on each plate of a parallel plate capacitor has a magnitude equal to

\frac{1}{2} Q E

, where

Q

is the charge on the capacitor, and

E

is the magnitude of electric field between the plates. Explain the origin of the factor

\frac{1}{2}

EASY

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 28

Choose the correct relation between polarisation and electric susceptibility of dielectric material.

EASY

12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 29

Two charges of

+ μ C

and

+ 20 μ C

are separated by a distance 2cm. The net potential (electric) due to the pair at the middle point of the line joining the two changes, is

What is the angle between electric field and equipotential surface?

Important Questions on Electrostatic Potential and Capacitance

Learn and Prepare for any exam you want !