Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 113

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A particle of mass $2 g$ and charge $1 μC$ is held at rest on a frictionless horizontal surface at a distance of $1 m$ from a fixed charge of $1 mC$ . If the particle is released it will be repelled. The speed of the particle when it is a distance of $10 m$ from the fixed charge is

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Important Questions on Electrostatics

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 114

On moving a charge of

20

coulombs by

2 cm, 2 J

of work is done, then the potential difference between the points is

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 115

For an infinite line of charge having charge density $λ$ lying along $x$ -axis, the work required in moving charge $q$ from $C$ to $A$ along the arc $C A$ is:

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 116

A flat circular fixed disc has a charge

+ Q

uniformly distributed on the disc. A charge

+ q

is thrown with kinetic energy

K

towards the disc along its axis. The charge

q :

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 117

In

H

atom, an electron is rotating around the proton in an orbit of radius

r .

Work done by an electron in moving once around the proton along the orbit will be-

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 118

You are given an arrangement of three-point charges

q

,

2 q

and

x q

separated by equal finite distances so that the electric potential energy of the system is zero. Then the value of

x

is

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 119

If a charge

q

is placed at the centre of the line joining two equal charges

Q

such that the system is in equilibrium, then the value of

q

is,

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 120

If

' n'

identical water drops assumed spherical each charged to potential energy

U

coalesce to a single drop, the potential energy of the single drop is (Assume that drops are uniformly charged):

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 121

Four charges equal to

- Q

are placed at the four corners of a square and a charge

q

is at its centre. If the system is in equilibrium, the value of

q

is