Questions and answers for exam Preparation

MCQs

Total Questions : 480 | Page 42 of 48 pages

Question 411. Doubling the operating frequency of a purely inductive circuit:

doubles the amount of current through the inductors
has no effect on the current through the inductors
cuts the current through the inductors one-half
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
None of the above

Discuss Question

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

Question 412. 1 Microfarad is the same as:

1 millionth of a picofarad
1000 millifarads
1 million picofarads
1 million farads
None of the above

Discuss Question

Answer: Option C. -> 1 million picofarads

Question 413. Which one of the following statements is true for resistance in a parallel circuit?

The total resistance is equal to the sum of the individual resistances in a parallel circuit.
The total resistance of a parallel circuit is always less than the value of the smallest resistance
The total resistance of a parallel circuit is equal to the total voltage
The total resistance in a parallel circuit is equal to the average value of the individual resistances
None of the above

Discuss Question

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

Question 414. The direction of conventional current flow is:

from negative to positive
from positive to negative
from left to right
from neutral to positive
None of the above

Discuss Question

Answer: Option B. -> from positive to negative

Question 415. 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:

One-half the primary current
Same as the primary current
Twice the primary current
No more than 10% less than the primary current
None of the above

Discuss Question

Answer: Option A. -> One-half the primary current

Question 416. The basic unit of measurement for resistance is the:

volt
ampere
ohm
watt
None of the above

Discuss Question

Answer: Option C. -> ohm

Question 417. When operating below its resonant frequency, a series RLC circuit has the characteristics of a:

series RL circuit
series RC circuit
series RLC circuit operated above its resonant frequency
purely resistive circuit
None of the above

Discuss Question

Answer: Option B. -> series RC circuit

Question 418. What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?