Electric Charges at rest

The scientist, who proved that lightning is electrical in nature, was (a)   .

Two charged objects, are brought close to each other. The two objects would-

• Always repel each other.

• Always attract each other.

• Either atract or repel each other.

• Neither attract more repel each other.

Lightning is a natural electrical discharge phenomenon.

• True

• False

The charges acquired by a glass rod, and the silk cloth with which it is rubbed, are equal and of the opposite sign.

• False

• True

During charging, by induction, it is -

• The charged object, as well as the earth, that share their charges with the object to be charged.

• Only the charged object that shares its charges, with the object to be charged.

• Only the earth that 'shares its charges', with the object to be charged

• The uncharged object that is able to produce charges on itself.

A student is provided with four objects-

A) A plastic comb B) A copper rod C) A rubber balloon D) A woollen cloth

The object, that can be easily charged by rubbing, is the object labelled as-

• A

• B

• C

• D

A charged plastic comb (comb B) is brought near another similarly charged, and suspended, plastic comb (comb A). Then comb A would-

• Remain unaffected

• Move towards comb B

• Move away from comb B

• Start oscillating

Charges are always produced in (a)   .

Charging by rubbing is due to -

• Friction

• Induction

• Conduction

• Contact

When a glass rod is rubbed against a silk cloth, the charge acquired by the silk cloth is -

• Positive

• Negative