Question

In which of the following, the principle of chemical effects of electricity is used?

• A. telephone
• B. electroplating
• C. electric bell
• D. electric motor

Answer 1

The correct option is B

electroplating

The explanation for the correct option

Option B

1. Electroplating is a process that takes place due to the chemical effect of an electric current in which a layer of metal is deposited over another substance. It occurs when electricity is passed through a conducting solution. It is used for the protection of metals from corrosion e.g -coating copper over brass.
2. It plays an important role in the manufacturing of imitation jewelry.

The explanation for the incorrect option

Option (A)

The telephone works on the magnetic effect of electric current

option (C)

1. The electric bell works on the principle of electromagnetism.
2. The electric bell circuit consists of a coil of wire wound on an iron piece. making a solenoid that acts as an electromagnet.

option (D)

1. An electric motor utilizes the magnetic effect of current.
2. It deals with the rule that when a rectangular coil is placed in an electric field an electric current is allowed to pass through it. this leads to the generation of a force that acts on the coil and rotates it continuously.

Therefore, only the process of electroplating is based on the chemical effects of electric current.

Hence option B is correct