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If the positive and negative charge on a body is balanced, then there is no net charge on the body.

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Important Questions on Static Electricity

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Science>Physics>Static Electricity>Electric charge

Two identical conducting spheres A and B carry equal charge. They are initially separated by a distance much larger than their diameters and the force between them is F. A third identical conducting sphere C is uncharged. Sphere C is first touched to A, then to C and removed. As a result, the force between A and B now is

MEDIUM

Science>Physics>Static Electricity>Electric charge

Ten charges are placed on the circumference of a circle of radius

R

with constant angular separation between successive charges. Alternate charges

1, 3, 5, 7, 9

have charge

(+ q)

each, while

2, 4, 6, 8, 10

have charge

(- q)

each. The potential V and the electric field E at the centre of the circle are respectively : (Take

V = 0

at infinity)

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Science>Physics>Static Electricity>Electric charge

As shown in the figure, two particles, each of mass $' m'$ tied at the ends of a light string of length $2 a$ are kept on a frictionless horizontal surface. When the mid point $(P)$ of the string is pulled vertically upwards with a small but constant force $F,$ the particles move towards each other on the surface. Magnitude of acceleration of each particle, when the separation between them becomes $2 x$ is

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HARD

Science>Physics>Static Electricity>Electric charge

Two isolated conducting spheres

S_{1}

and

S_{2}

of radius

\frac{2}{3} R

and

\frac{1}{3} R

have

12 μ C

and

- 3 μ C

charges, respectively, and are at a large distance from each other, They are now connected by a conducting wire. A long time after this is done the charges on

S_{1}

and

S_{2}

are respectively:

MEDIUM

Science>Physics>Static Electricity>Electric charge

State two ways of charging a conductor.

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Science>Physics>Static Electricity>Electric charge

How will you charge a glass rod by the method of friction?

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Science>Physics>Static Electricity>Electric charge

How will you charge a plastic comb (plastic scale or plastic pen) by the method of friction?

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Science>Physics>Static Electricity>Electric charge

How will you charge a ballpoint pen refill by the method of friction?

MEDIUM

Science>Physics>Static Electricity>Electric charge

Describe the method of charging a conductor by conduction.

MEDIUM

Science>Physics>Static Electricity>Electric charge

Explain the charging by conduction in terms of movement of electrons.

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Science>Physics>Static Electricity>Electric charge

A glass rod is rubbed with silk. Explain the charging of the glass rod and the silk on the basis of electron movement.

EASY

Science>Physics>Static Electricity>Electric charge

Explain why a charged body loses its charge when we touch it with our hand.

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Science>Physics>Static Electricity>Electric charge

Figure below shows a metal rod AB placed on an insulating stand. In figure (a) a negatively charged ebonite rod C is touched with the metal rod AB, while in figure (b), the negatively charged ebonite rod C is held near the rod AB. State the kind of charges at the ends A and B of the rod, in each case.
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Science>Physics>Static Electricity>Electric charge

How will you charge an inflated rubber balloon by the method of friction?

MEDIUM

Science>Physics>Static Electricity>Electric charge

A metal rod A is to be charged positively by using another charged rod B. What should be the kind of charge on rod B if charging is to be done by conduction?

MEDIUM

Science>Physics>Static Electricity>Electric charge

An ebonite rod is rubbed with fur. Explain the charging of the ebonite rod and the fur on the basis of electron movement.

MEDIUM

Science>Physics>Static Electricity>Electric charge

Describe the method of charging a conductor by induction.

MEDIUM

Science>Physics>Static Electricity>Electric charge

An inflated rubber balloon is rubbed with a woollen cloth whereas a ballpoint pen refill is rubbed with a polythene bag. Which of these will get positively charged?
(a) Inflated rubber balloon (b) Woollen cloth (c) Ballpoint pen refill (d) Polythene bag

EASY

Science>Physics>Static Electricity>Electric charge

A plastic comb is rubbed with dry hair whereas a glass rod is rubbed with a piece of silk cloth. Which of these will get negatively charged?
(a) Plastic comb (b) Glass rod (c) Dry hair (d) Silk cloth

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Science>Physics>Static Electricity>Electric charge

Name two substances which can be charged by friction.

If the positive and negative charge on a body is balanced, then there is no net charge on the body.

Important Questions on Static Electricity

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