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Faraday. Generators/ Motors. Induced Current. Lenz’s Law/ Changing B. Transformers. 1pt. 1 pt. 1 pt. 1pt. 1 pt. 2 pt. 2 pt. 2pt. 2pt. 2 pt. 3 pt. 3 pt. 3 pt. 3 pt. 3 pt. 4 pt. 4 pt. 4pt. 4 pt. 4pt. 5pt. 5 pt. 5 pt. 5 pt. 5 pt. - PowerPoint PPT Presentation
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2 pt
3 pt
4 pt
5pt
1 pt
2 pt
3 pt
4 pt
5 pt
1 pt
2pt
3 pt
4pt
5 pt
1pt
2pt
3 pt
4 pt
5 pt
1 pt
2 pt
3 pt
4pt
5 pt
1pt
FaradayGenerators/
MotorsInduced Current
Lenz’s Law/ Changing B
Transformers
The direction of the induced current is dependent on the relative motion of
the coil with respect to the magnet.
-Outstretched fingers are magnetic field
-Extended thumb is direction wire moves
-Palm shows direction of current flow
A permanent horseshoe magnet is mounted so that the magnetic
field lines are vertical. If a student passes a straight wire between the poles and pulls it
toward herself, the current flow through the wire is from left to right. Which is the N – pole of
the magnet?
Increase the velocity of the wire
Increase the length of the wire
Increase the magnetic field strength
The N-pole of a magnet is moved
toward the right end of a coil. The
direction of the induced current is?
The varying magnetic flux is carried through the core
to the secondary coil which induces a varying EMF in the secondary
coil. This is called ______________
A step-up transformer increases voltage – the current in the primary
circuit is ______ than that in the secondary.
Upon what does the ratio of the EMF in the
primary of a transformer to the EMF in the secondary of the transformer depend?
The ratio of number of turns of wire in the primary to the number of turns of wire in
the secondary.