Question

The source of a generator’s electrical energy output is the work done to turn its coils. How is the work needed to turn the generator related to Lenz’s law?

a) The work needed is inversely proportional to Lenz's law.

b) Lenz's law has no effect on the work needed to turn the generator.

c) The work needed is directly proportional to Lenz's law.

d) Lenz's law only affects the efficiency of the generator.

Answer 1

The work needed to turn a generator is directly related to Lenz's law, which states that the direction of the induced current opposes the change in magnetic flux. When the generator is turned, the changing magnetic flux induces an emf in the coil, creating a current that opposes the change in flux.

Step-by-step explanation:

The work needed to turn a generator is directly related to Lenz's law. The work needed to turn a generator is directly related to Lenz's law, which states that the direction of the induced current opposes the change in magnetic flux. When the generator is turned, the changing magnetic flux induces an emf in the coil, creating a current that opposes the change in flux.

According to Lenz's law, the direction of the induced current in a coil is such that it opposes the change in magnetic flux. When the generator is being turned, the coils experience a changing magnetic flux, which induces an electromotive force (emf) in the coil.

This induced emf creates a current that creates a magnetic field opposing the change in magnetic flux. As a result, more work is needed to overcome this opposition and turn the generator.