True or False? The magnitude of the EMF produced in a generator depends on the s

Question

True or False? The magnitude of the EMF produced in a generator depends on the speed at which the generator turns.

When I move a conductor through a magnetic field, the change in magnetic field creates a net change in magnetic flux. The EMF that is induced by this changing flux creates tiny motional currents that are called _______.

True or False? In an RL circuit, the larger the value of R (i.e. the resistance of the circuit), the longer it takes the circuit to reach its final steady-state value (with all else being held constant).

Suppose we measure the energy stored in some inductor to be E when there is a current I running through it. If I double the current in the inductor, the new total energy will become _____.

True or False? If I were to hook up an AC voltage source to a resistor, the voltage drop across the resistor would be in phase with the current in the circuit.

I wish to use a step up transformer to turn an initial RMS AC voltage of 100 V into a final RMS AC voltage of 200 V. What is the ratio of the number of turns in the primary to the secondary?

Explanation / Answer

1. The magnitude of the EMF produced in a generator depends on the speed at which the generator turns.

(true)

2.When I move a conductor through a magnetic field, the change in magnetic field creates a net change in magnetic flux. The EMF that is induced by this changing flux creates tiny motional currents that are called _______

4.eddy current

3.(TRUE )When I move a conductor through a magnetic field, the change in magnetic field creates a net change in magnetic flux. The EMF that is induced by this changing flux creates tiny motional currents that are called _______.

4.Suppose we measure the energy stored in some inductor to be E when there is a current I running through it. If I double the current in the inductor, the new total energy will become

(5.E/4)

5. TRUE   If I were to hook up an AC voltage source to a resistor, the voltage drop across the resistor would be in phase with the current in the circuit.

6.I wish to use a step up transformer to turn an initial RMS AC voltage of 100 V into a final RMS AC voltage of 200 V. What is the ratio of the number of turns in the primary to the secondary?

ANS. 1/2

.

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