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Two equal negative charges $- q$ are fixed at points $(0, a)$ and $(0 . - a)$ on the y-axis. A positive charge $Q$ is released from rest at the point $(2 a, 0)$ on the x-axis. The charge $Q$ will

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Important Questions on Electrostatics

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 11

Two infinite linear charges are placed parallel to each other at a distance of

0.1 m

from each other. If the linear charge density on each is

5 μC m^{- 1}

, then the force acting on a unit length of each linear charge will be,

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 12

An electron of mass

m_{e}

, initially at rest, moves through a certain distance in a uniform electric field in time

t_{1}

. A proton of mass

m_{p}

, also initially at rest, takes time

t_{2}

to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio

\frac{t_{2}}{t_{1}}

is nearly equal to,

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 15

A point charge

50 μC

is located in the

x - y

plane at the point of position vector

{\vec{r}}_{0} = (2 \hat{i} + 3 \hat{j}) m .

What is the electric field at the point of the position vector

\vec{r} = (8 \hat{i} - 5 \hat{j}) m

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 17

Rank the work required to assemble the charge distributions below from least to greatest. In all cases, the separation between the middle charge and the outer charges are the same. Use a reference of zero potential energy at $\infty$ .

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 18

The arc $A B$ with the centre $C$ and the infinitely long wire having linear charge density $λ$ are lying in the same plane. Find the minimum amount of work done in moving a point charge $q_{0}$ from point $A$ to $B$ through a circular path $A B$ of radius a is equal to:

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 21

Two identical thin rings, each of radius

R

metres, are coaxially placed at a distance

R

metre apart. If

Q_{1}

coulomb and

Q 2

coulomb are respectively the charges uniformly
spread on the two rings, the work done in moving a charge

q

coulomb from the centre of one ring to that of the other is

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 22

Two identical particles of mass

m

carry a charge

Q

each. Initially one is at rest on a smooth horizontal plane and the other is projected along the plane directly towards first particle from a large distance with speed

v

. The closest distance of approach be:

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Beta Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 24

A charge

3 C

experiences a force of

300 N

when placed in a uniform electric field. The potential difference between two points separated by a distance of

10 cm

along the field line is :

Two equal negative charges -q are fixed at points (0,a) and (0.-a) on the y-axis. A positive charge Q is released from rest at the point (2a,0) on the x-axis. The charge Q will

Important Questions on Electrostatics

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Two equal negative charges $- q$ are fixed at points $(0, a)$ and $(0 . - a)$ on the y-axis. A positive charge $Q$ is released from rest at the point $(2 a, 0)$ on the x-axis. The charge $Q$ will