Computer Science - Electronic Principles

Exercise :: Electronic Principles - Section 4
1.
1 Microfarad is the same as:

A.
1 millionth of a picofarad B.
1000 millifarads C.
1 million picofarads D.
1 million farads E.
None of the above

Answer: Option C

Explanation:

2.
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 E.
None of the above

Answer: Option B

Explanation:

3.
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 E.
None of the above

Answer: Option B

Explanation:

4.
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 E.
None of the above

Answer: Option C

Explanation:

5.
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 E.
None of the above

Answer: Option A

Explanation: