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A reversing switch that rotates with the coil in an electric motor and reverses the direction of the current every half turn is a ____.
In a step-up transformer, the number of turns of wire is greater in the ____ coil than in the ____ coil, and the ____ voltage exceeds the ____ voltage.
secondary, primary, output, input
____ is the process of producing an electric current by moving a loop of wire through a magnetic field.
Alternating current is transmitted across large distances at high voltage to minimize ____.
energy loss as heat
The strength of magnetic force in an electromagnet is ____ by increasing the current through the coil.
A(n) ____________________ is formed by placing a piece of iron inside a current-carrying coil of wire.
A machine that changes electrical energy to mechanical energy is a(n) ____________________ used to do work, such as turning a fan.
A device that produces an electric current by rotating a coil of wire in a magnetic field is a(n) ____________________.
The process by which moving a wire through a magnetic field produces an electric current is _________________________.
What happens to the rotation of the coil in a motor if the current flowing through it is increased?
it rotates faster with greater force
What happens to the direction of the magnetic field around a wire when the direction of the current is changed?
the magnetic field will reverse its direction
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