Exercise: Electronic Principles

Questions for: Electronic Principles

The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:
A:
One-half the primary current
B:
Same as the primary current
C:
Twice the primary current
D:
No more than 10% less than the primary current
Answer: A
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Doubling the operating frequency of a purely inductive circuit:
A:
doubles the amount of current through the inductors
B:
has no effect on the current through the inductors
C:
cuts the current through the inductors one-half
D:
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
Answer: C
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The direction of conventional current flow is:
A:
from negative to positive
B:
from positive to negative
C:
from left to right
D:
from neutral to positive
Answer: B
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Which one of the following statements is true for resistance in a parallel circuit?
A:
The total resistance is equal to the sum of the individual resistances in a parallel circuit.
B:
The total resistance of a parallel circuit is always less than the value of the smallest resistance
C:
The total resistance of a parallel circuit is equal to the total voltage
D:
The total resistance in a parallel circuit is equal to the average value of the individual resistances
Answer: B
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1 Microfarad is the same as:
A:
1 millionth of a picofarad
B:
1000 millifarads
C:
1 million picofarads
D:
1 million farads
Answer: C
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