Electromagnetic Induction Quiz

Class XII

Physics

Electromagnetic Induction

13 questions

EASY

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1. What does Faraday's law of electromagnetic induction state?

Current is directly proportional to resistance. · The induced EMF is directly proportional to the rate of change of magnetic flux. · Magnetic fields do not affect electric currents. · Electric fields are independent of magnetic fields.

2. What is the unit of magnetic flux?

Tesla · Weber · Henry · Volt

3. Which of the following is a consequence of Lenz's law?

Induced current flows in the direction to oppose the change in magnetic flux. · Induced current flows in the direction to enhance the change in magnetic flux. · Induced EMF is always positive. · Magnetic fields can be created without electric currents.

4. What is the formula for calculating induced EMF?

E = -dΦ/dt · E = R * I · E = V * I · E = m * a

5. What does the negative sign in Faraday's law indicate?

The direction of induced EMF is always positive. · The induced EMF opposes the change in magnetic flux. · The magnetic field is always increasing. · The current will always flow clockwise.