Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 10 - Electrostatics>Practice Exercise>Q 27

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IMPORTANT

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Two charges in air experience a coulomb force of $20 N$ . If the space between them is filled with a medium of dielectric constant $K = 4$ , then what is the new force?

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Important Questions on Electrostatics

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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 10 - Electrostatics>Practice Exercise>Q 28

An electron of mass

9 \times 10^{- 31} kg

and charge

1.6 \times 10^{- 19} C

is placed in an electric field of strength

9 \times 10^{6} N C^{- 1}

, the force on electron will be

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NDA & NA EE

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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 10 - Electrostatics>Practice Exercise>Q 30

A capacitor of

20 μ F

and charged to

500 V

is connected in parallel to another capacitor of

10 μ F

charged to

200 V

. The common potential will be

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NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 10 - Electrostatics>Practice Exercise>Q 31

Two similarly charged bodies are kept

5 cm

apart in air. If the second body is shifted away from the first by another

5 cm

, their force of repulsion will be