A generator or dynamo works on the principle:

Options

A. magnetic effect of electric current
B. electromagnetic induction
C. chcmical. effect of electric current
D. heating effect of electric currert

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Generator/Dynamo**: A generator, also known as a dynamo, is a device that converts mechanical energy into electrical energy. It is commonly used to produce electricity in various applications.

2. **Principle of Electromagnetic Induction**: The working principle of a generator is based on the phenomenon known as electromagnetic induction. This principle states that when a conductor (like a coil of wire) is moved through a magnetic field, an electromotive force (EMF) is induced in the conductor.

3. **Inducing EMF**: In a generator, as the coil rotates within the magnetic field, the motion of the coil causes the magnetic field lines to cut through the coil. This cutting of magnetic field lines induces an EMF in the coil according to Faraday's law of electromagnetic induction.

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