Question

Which of the following statements is not true?

• A. Lightning and sparks from woolen clothing are essentially the same phenomena.
• B. When you rub a plastic scale on dry hair, it acquires a charge.
• C. A glass rod when rubbed with silk acquires a negative charge.
• D. Static charges are called so because they do not move by themselves.

Answer 1

The correct option is C

A glass rod when rubbed with silk acquires a negative charge.

A glass rod when rubbed with silk acquires a positive charge as it loses electrons. It attains a comparatively more number of positive charges than negative charges. Hence the glass rod is said to be positively charged.