Tag: charging and discharging

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Multiple choice physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

When a glass rod is rubbed with a piece of silk cloth the rod:

  1. and the cloth both acquire positive charge.

  2. becomes positively charged while the cloth has a negative charge.

  3. and the cloth both acquire negative charge.

  4. becomes negatively charged while the cloth has a positive charge.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The two objects charged by friction gets oppositely charged. 
Charge acquired by the glass rod is positive and charge acquired by the cloth is negative. 
Multiple choice physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging

Rub an empty ball pen refill on a polythene sheet and hold it on top of small pieces of paper. What will be your observation?

  1. Pieces of paper are attracted.

  2. Pieces of paper are repelled.

  3. Pieces of paper are neither attracted nor repelled.

  4. Pieces of paper are either attracted or repelled.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When refill is rubbed on polythene it acquires small electric charges. Due to presence of these charges, pieces of paper gets attracted.

Multiple choice physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

What is the frictional order of the following materials on rubbing:

ebonite, glass rod, wool, plastic

  1. Wool, glass rod, ebonite, plastic

  2. Glass rod, wool, plastic, ebonite

  3. Wool, glass rod, plastic, ebonite

  4. Glass rod, wool, ebonite, plastic
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When any of these materials are rubbed together, the one in higher order gets positive charge (+) and the one in the lower order gets negative charge (-). The correct frictional order is: glass, wool, ebonite and plastic.