Electric charges at rest

_________ does not get charged up on rubbing.

• Drinking straw

• Glass rod

• Metal pan

• Ebonite rod

A device which is designed to minimize, or avoid, the loss of life and property during lightning is-

• Lightning conductor

• Gold leaf Electroscope

• Ebonite rod

• Metal rod

The scientist, who proved that lightning is electrical in nature was-

• Benjamin Franklin

• Joule

• Davy

• Ramford

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

• Positive

• Negative

Like charges always _______ each other.

• Attract

• Repel

During charging (i) by conduction, and (ii) by induction, the charge on the charging object-

• Decreases in both the cases

• Decreases in the first case but remains unchanged in the second case

• Decreases in the second case but remains unchanged in the first case

• Remains unchanged in both the cases.

A charged ebonite rod 'B' is brought near another similarly charged and suspended, ebonite rod 'A'. Then ebonite rod A, would-

• Remain unaffected

• Move towards rod B

• Move away from rod B

• Start oscillating

Substances which acquire sine charges on rubbing and do not allow electric charges to pass through them are called-

• Insulators

• Conductors

The process of charging an uncharged object without actually touching it with a charged object is called-

• Induction

• Conduction

• Rubbing/ friction

• Radiation

A sudden electric discharge between A charged up cloud and some other objects is called-

• Lighting

• Earthing

• Thundering

• None