Which of the following statements is correct regarding electric generator?
I.It converts electrical energy into mechanical energy.
II.It works on the basis of electromagnetic induction.

Correct option is D

​The correct answer is (d) Only II

Explanation:

• Statement I is incorrect because an electric generator converts mechanical energy into electrical energy, not the other way around. The reverse process (conversion of electrical energy into mechanical energy) is done by an electric motor.
• Statement II is correct because an electric generator works on the principle of electromagnetic induction, discovered by Michael Faraday. According to this principle, when a conductor moves in a magnetic field, an electric current is induced in the conductor.

Information Booster:

Working Principle of an Electric Generator:

1. A coil of wire is rotated inside a magnetic field between two magnets.
2. Due to Faraday’s Law of Electromagnetic Induction, a current is induced in the coil.
3. The induced alternating current (AC) is collected using slip rings and brushes in an AC generator.
4. In a DC generator, a commutator is used instead of slip rings to produce direct current (DC).

Types of Electric Generators:

1. AC Generator (Alternator) – Produces alternating current (AC). Used in power stations.
2. DC Generator – Produces direct current (DC). Used in vehicles and battery charging.

Applications of Electric Generators:

• Power plants for electricity production.
• Backup generators for homes and industries.
• Used in hydroelectric, thermal, and wind power stations.