What is the current through the load in the given circuit? 500 �A 10 mA 250 mA 1

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Question
What is the current through the load in the given circuit?
Options
A. 500 µA
B. 10 mA
C. 250 mA
D. 1.25 A

Correct Answer

250 mA

Transformers problems

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1. Which statement about a series RC circuit is true?
Options
A. The capacitor's voltage drop is in phase with the resistor's voltage drop.
B. The current leads the source voltage.
C. The current lags the source voltage.
D. The resistor voltage lags the current.

4.
If the frequency increases in the given circuit, how would the total current change?
Options
A. The total current would increase.
B. The total current would decrease.
C. The total current would remain the same.
D. More information is needed in order to predict how the total current would change.

6. A transformer has
Options
A. primary and secondary windings, both of which are considered inputs
B. primary and secondary windings, both of which are considered outputs
C. a primary winding used as an output and a secondary winding used as an input
D. a primary winding used as an input and a secondary winding used as an output

7. Increasing the number of turns of wire on the secondary of a transformer will
Options
A. increase the secondary current
B. decrease the secondary current
C. have no effect on the secondary current
D. increase the primary current

8. The coefficient of coupling between two coils is 0.45. The first coil has an inductance of 75 mH and the second coil has an inductance of 105 mH. What is the mutual inductance between the coils?
Options
A. 3.54 mH
B. 7.88 mH
C. 39.9 mH
D. 189.3 mH

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