Electromagnetic induction

Faraday's law says the induced emf is proportional to the:

• 1 Magnetic flux
• 2 Rate of change of magnetic flux
• 3 Area only
• 4 Resistance

Lenz's law is a consequence of conservation of:

• 1 Momentum only
• 2 Energy
• 3 Charge
• 4 Mass

A coil has 100 turns and the flux through each turn changes by 0.02 Wb in 0.1 s. The average emf is:

• 1 0.2 V
• 2 200 V
• 3 2 V
• 4 20 V

The SI unit of inductance is the:

• 1 Tesla
• 2 Henry
• 3 Farad
• 4 Weber

Energy stored in an inductor L carrying current I is:

• 1 L I2
• 2 1/2 L I
• 3 1/2 L I2
• 4 L I