Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 6

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Four charges are placed at the circumference of a dial clock as shown in the figure. If the clock has only hour hand and a charge $q_{0}$ is placed at the center, then the hour hand points in the direction which shows the time as

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Important Questions on Electrostatics

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 7

An electric dipole is placed on

x -

axis in proximity to a line charge of linear charge density

3.0 \times 10^{- 6} C m^{- 1} .

Line charge is placed on

z -

axis and positive and negative charge of dipole is at a distance of

10 mm

and

12 mm

from the origin respectively. If total force of

4 N

is exerted on the dipole, find out the amount of positive or negative charge of the dipole.

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 8

Two particles

A

and

B

having charges

20 μ C

and

- 5 μ C

respectively are held fixed with a separation of

5 cm

At what position a third charged particle should be placed so that it does not experience a net electric force ?
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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 9

Two charges of

1 μC

and

5 μC

are placed

4 cm

apart. The ratio of forces exerted by both the charges on each other will be

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 10

An uncharged parallel plate capacitor filled with an oil is connected in parallel with an identical but air filled capacitor charged to a potential

V_{1}

. If the common potential is

V_{2}

, the dielectric constant of the oil is

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 11

A parallel plate capacitor is connected to a battery and a dielectric slab is inserted between the plates, then which quantity increase :

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 12

An electron falls through a small distance in a uniform electric field of magnitude

2 \times 10^{4} N C^{- 1}

. The direction of the field is reversed keeping the magnitude unchanged and a proton falls through the same distance. The time of fall will be

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 13

A ring of charge with radius $0.5 m$ has $0.002 π m$ gap. If the ring carries a charge of $+ 1 C$ , the electric field at the centre is
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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 14

An electron is taken from point $A$ to point $B$ along the path $A B$ in a uniform electric field of intensity $E = 10 V m^{- 1}$ . Side $A B = 5 m$ and side $B C = 3 m$ . Then the amount of work done on the electron by us is