Question

When a plastic comb is rubbed with dry hair, the hair get positively charged by friction. In this porcess:
A. the hair loses some positive protons
B. the hair gain some positive protons
C. the hair loses some negative electrons
D. the hair gain some negative electrons

Answer 1

Answer

c. The hair loses some negative electrons

Explanation

When electrons are lost, positive charge is formed

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Answer 2

When a plastic comb is rubbed with dry hair, C. the hair loses some negative electrons.

Explanation:

• When we comb dry hair with plastic comb, friction takes place between two objects.
• Due to friction, hair losses some electrons to plastic comb.
• Due to loss of electron, the hair becomes positively charged and due to gain of electron, plastic comb becomes negatively charged.
• There is only role of electron in the friction. The absence of electron causes positive charge not the presence of proton.
• Positive and negative charge of the object depends on the conductivity of the object.