Potential at a point A is 3 volt and at a point B is 7 volt, an electron is moving towards A from B :

To reach A it must have more than or equal to 4 eV K.E. at B

It need not have any K.E. at B to reach A

When it will reach A , it will have K.E. more than or at least equal to 4 eV if it was released from rest at B .

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Two positively charged particles $X$ and $Y$ are initially far away from each other and at rest. $X$ begins to move towards $Y$ with some initial velocity. The total momentum and energy of the system are $p$ and $E$ :

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Important Questions on Electrostatics

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 14

Two particles

X

and

Y

, of equal mass and with unequal positive charges, are free to move and are initially far away from each other. With

Y

at rest,

X

begins to move towards it with initial velocity

u

. After a long time, finally:

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 15

In a uniform electric field, the potential is

10 V

at the origin of coordinates and

8 V

at each of the points

(1, 0, 0)

and

(0, 1, 0)

and

(0, 0, 1)

. The potential at the point

(1, 1, 1)

will be

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 18

Potential at a point

A

3

volt and at a point

B

7

volt, an electron is moving towards

A

from

B

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 20

A particle of mass

m

and charge

q

is thrown in a region where uniform gravitational field and electric field are present. The path of particle:

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 22

The diagram shows three infinitely long uniform line charges placed on the $X, Y$ and $Z$ axis. The work done in moving a unit positive charge from $(1, 1, 1)$ to $(0, 1, 1)$ is equal to:

Question Image

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 23

The electric potential decreases uniformly from

V

- V

along

X

-axis in a coordinate system as we moves from a point

(- x_{\circ}, 0)

(x_{\circ}, 0)

, then the electric field at the origin :

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 25

The dipole moment of a system of charge

+ q

distributed uniformly on an arc of radius

R

subtending an angle

\frac{π}{2}

at its centre where another charge

- q

is placed is

HARD

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-2>Q 26

An electric dipole is kept on the axis of a uniformly charged ring at distance

\frac{R}{\sqrt{2}}

from the centre of the ring. The direction of the dipole moment is along the axis. The dipole moment is

P

, the charge of the ring is

Q

and radius of the ring is

R

. The force on the dipole is

Two positively charged particles X and Y are initially far away from each other and at rest. X begins to move towards Y with some initial velocity. The total momentum and energy of the system are p and E :

Important Questions on Electrostatics

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Two positively charged particles $X$ and $Y$ are initially far away from each other and at rest. $X$ begins to move towards $Y$ with some initial velocity. The total momentum and energy of the system are $p$ and $E$ :