Positive and negative point charges of equal magnitude are kept at 0,0 , a 2 and 0,0 , - a 2 , respectively. The work done by the electric field when another positive point charge is moved from - a , 0 , 0 to 0 , a , 0 is

depends on the path connecting the initial and final positions.

A charge Q is distributed over three concentric spherical shells of radii a , b , c a < b < c such that their surface charge densities are equal to one another. The total potential at a point at distance r from their common centre, where r < a , would be:

Q a + b + c 4 π ϵ 0 a 2 + b 2 + c 2

Q a 2 + b 2 + c 2 4 π ϵ 0 a 3 + b 3 + c 3

Q 12 π ϵ 0 a b + b c + c a a b c

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 97

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Under the influence of charge, a point charge $q$ is carried along different paths from a point $A$ to point $B,$ then work done will be -

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Important Questions on Electrostatics

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 98

In the electric field of charge $Q,$ another charge is carried from $A$ to $B$ , $A$ to $C,$ $A$ to $D$ and $A$ to $E,$ then work done will be -

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 99

The work done to take an electron from rest where potential is

- 60 V

to another point where potential is

- 20 V

is given by -

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 100

If a charge is shifted from a low potential region to a high potential region. The electrical potential energy:

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 101

A particle

A

has charge

+ q

and a particle

B

has charge

+ 4 q

with each of them having the same mass

m .

When allowed to fall from rest through the same electric potential difference, the ratio of their speed

\frac{v_{A}}{v_{B}}

will become

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 102

In an electron gun, electrons are accelerated through a potential difference of

V

volt. Taking electronic charge and mass to be respectively

e

and

m,

the maximum velocity attained by them is:

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 103

In a cathode ray tube, if

V

is the potential difference between the cathode and anode, the speed of the electrons, when they reach the anode is proportional to: (Assume initial velocity

= 0

)

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 104

An electron of mass

m

and charge

e

is accelerated from rest through a potential difference

V

in a vacuum. The final speed of the electron will be

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 105

Positive and negative point charges of equal magnitude are kept at

(0,0, \frac{a}{2})

and

(0,0, \frac{- a}{2})

, respectively. The work done by the electric field when another positive point charge is moved from

(- a, 0, 0)

to

(0, a, 0)

is

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Under the influence of charge, a point charge q is carried along different paths from a point A to point B, then work done will be -

Important Questions on Electrostatics

Learn and Prepare for any exam you want !

Under the influence of charge, a point charge $q$ is carried along different paths from a point $A$ to point $B,$ then work done will be -