Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 36

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The linear charge density on upper half of a segment of ring is $λ$ and at lower half, it is $- λ .$ The direction of electric field at centre $O$ of ring 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 37

The given figure gives electric lines of force due to two charges $q_{1}$ and $q_{2} .$ What are the signs of the two charges?

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 38

A

+ q_{1}

charge is at the centre of an imaginary spherical Gaussian surface

' S',

and

- q_{1}

charge is placed nearby this

+ q_{1}

charge inside

' S' .

A charge

+ q_{2}

is located outside this Gaussian surface. Then electric field on Gaussian surface will be

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 39

Three large parallel plates have uniform surface charge densities as shown in the figure. Find out electric field intensity at point $P .$

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 40

The wrong statement about electric lines of force is -

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 41

The insulation property of air breaks down at

3 \times 10^{6} V m^{- 1} .

The maximum charge that can be given to a sphere of diameter

5 m

is nearly

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 43

The electric field required to keep a water drop of mass

m

and charge

e

just to remain suspended is :

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 44

Two parallel large thin metal sheets have equal surface charge densities

(σ = 26.4 \times 10^{- 12} C m^{- 2})

of opposite signs. The electric field between these sheets is

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 45

A charged ball $B$ hangs from a silk thread $S,$ which makes an angle $θ$ with a large charged conducting sheet $P,$ as shown in the figure. The surface charge density $σ$ of the sheet is proportional to

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