Which of the following cannot be charged easily by friction?

• A copper rod

• A plastic scale

• An inflated balloon

• A woollen cloth.

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

• and the cloth both acquire positive charge.

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

• and the cloth both acquire negative charge.

• becomes negatively charged while the cloth has a positive charge.

Write T against true and F against false in the following statements:

Like charges attract each other.

Write T against true and F against false in the following statements:

A charged glass rod attract a charged plastic straw.