Which statement describes the motor effect?
A motor takes in current and gives out spin. Could the same machine run backward, taking in spin and giving out current?
It can. And the two directions of that trade each have a name.
In the Motor effect topic, you saw the first direction: a current-carrying wire in a magnetic field feels a force. Current goes in; motion comes out.
Earlier in this topic, you saw the second direction: moving a wire or coil in a magnetic field induces an EMF, and the EMF can drive a current. Motion goes in; current comes out.
Using motion in a magnetic field to drive a current is called the generator effect.
Here is the pair in one line: the motor effect turns current into motion; the generator effect turns motion into current.
The same coil-between-magnets arrangement can run as either one. Fed a current, the coil spins. Spun by hand, it feeds a current back.
A coil sits between magnet poles and spins when a current is fed in. The current is switched off, and the coil is spun by hand instead. What does the coil do now?
Spinning the coil is motion in a magnetic field.
Motion in a magnetic field induces an EMF, the generator effect.
The EMF drives a current around the coil's circuit.
The spinning coil drives a current in its circuit.
Which direction does the generator effect run: current into motion, or motion into current?
The motor effect turns current into motion.
The generator effect is the motor effect reversed.
The generator effect turns motion into current.
The generator effect turns…
Quinn says the motor effect turns motion into current. Is Quinn correct?
Mateo says the generator effect is the motor arrangement run in reverse: spin the coil, and a current comes out. Is Mateo correct?
Which statement states the generator effect?
A toy motor from a kit spins when wired to a battery. Mateo removes the battery, wires a voltmeter in its place, and spins the shaft with his fingers. What does the voltmeter show?
Which pairing is correct?