Faraday + Lenz — true or false?

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   EMF induced = −dΦ/dt where Φ is magnetic flux.

2. Statement is true

   Yes

   Statement

   Lenz's law arises from conservation of energy.

3. Statement is true

   No

   Statement

   A stationary magnet inside a stationary coil induces an EMF.

4. Statement is true

   Yes

   Statement

   The induced current opposes the change that caused it.

5. Statement is true

   No

   Statement

   Induced EMF depends on absolute flux, not on its rate of change.