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Question
Figure E/M-3
Refer to the figure above. When the switch is closed in the primary circuit,
1) voltage is established in the primary coil
2) a current is established in the primary coil
3) a magnetic field builds up around the primary coil
4) all of the above
and a voltage is induced in the secondary circuit principally because
5) of the voltage in the primary.
6) of the change of current in the primary.
7) the expanding magnetic field about the primary is sensed by the secondary.
Answer
This answer is hidden. It contains 3 characters.
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