# Electronic Principles – Section 4

1. 1 Microfarad is the same as:

A. 1 millionth of a picofarad
E. None of the above

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

Correct Answer:  B. The total resistance of a parallel circuit is always less than the value of the smallest resistance

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

Correct Answer:  B. from positive to negative

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

Correct Answer:  C. cuts the current through the inductors one-half

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

Correct Answer:  A. One-half the primary current