Questions and answers for exam Preparation

MCQs

Total Questions : 480 | Page 43 of 48 pages

Question 421. A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding?

4.73
0.4 V
24 V
600 V
None of the above

Discuss Question

Answer: Option C. -> 24 V

Question 422. Which one of the following statements is true for the currents in a parallel RC circuit?

The total current is equal to the sum of the currents for the resistance and capacitance
The current always has the same amplitude and phase for every part of the circuit
The total current is less than the sum of the currents for the resistance and capacitance
The total current. is greater than the sum of the currents for the resistance and capacitance
None of the above

Discuss Question

Answer: Option A. -> The total current is equal to the sum of the currents for the resistance and capacitance

Question 423. When the graph of current versus voltage is a straight line, the device is referred to as

Active
Linear
Nonlinear
Bipolar
None of the above

Discuss Question

Answer: Option B. -> Linear

Question 424. The total inductance of a series inductor circuit is:

equal to the sum of the individual inductance values
equal to the sum of the individual inductive-reactance values
less than the value of the smallest inductor
equal to the source voltage divided by total current
None of the above

Discuss Question

Answer: Option A. -> equal to the sum of the individual inductance values

Question 425. Which one of the following statements is true for current flowing in a series circuit?

The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
The same current flows through every part of a series circuit
The total current in a series circuit is equal to the total voltage multiplied by the total resistance
None of the above

Discuss Question

Answer: Option C. -> The same current flows through every part of a series circuit

Question 426. The direction of electron current flow is:

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

Discuss Question

Answer: Option C. -> from negative to positive

Question 427. The Thevenin resistance is equal in value to the

Load resistance
Half the load resistance
Internal resistance of a Morton circuit
Open-load resistance
None of the above

Discuss Question

Answer: Option A. -> Load resistance

Question 428. Most AC power is obtained from:

generators
batteries
oscillators
lightning
None of the above

Discuss Question

Answer: Option C. -> oscillators

Question 429. A device that converts mechanical pressure to electrical energy is called a:

piezoelectric device
solar cell
photodiode
nicad cell
None of the above

Discuss Question

Answer: Option A. -> piezoelectric device

Question 430. Which one of the following statements is true for the voltage in a parallel RC circuit?

The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage leads the total current by less than 90 degree
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of the above

Discuss Question

Answer: Option A. -> The voltage always has the same amplitude and phase for every part of the circuit