A Beka: Physics Quiz 36

What law states that the current induced by a change in magnetic flux is directed so as to create a magnetic field that opposes the change?

Lenz's OR Lenz's law

What is the potential difference formed by a device joining two different conductors at two junctions that are kept at different temperatures?

Seebeck voltage

In a generator, a(n) ? is an assembly of one or more conducting loops in which current is induced while rotating within a magnetic field. armature

armature

Electrochemical cells connected together constitute a(n) ? .

battery

The current delivered by cells connected in parallel is limited by the current-generating capacity of the smallest cell.

false

When a mechanical stress is applied to the surface of a(n) ? crystal, a current will be induced.

piezoelectric

The source of mechanical energy of a generator is called the ? mover.

prime

What device, made of two different conductors, produces current when its junctions are maintained at different temperatures?

thermocouple

The cathode is the electrode in a cell that draws electrons from the conducting wire.

true

The voltage of cells in parallel is the same as any individual cell's voltage.

true