BEE FREE Bachelor of Electrical Engineering Basic Electrical Questions and Answers 3

Question 1

What does a zener diode primarily regulate in a circuit?

Accepted Answer

Voltage

Answer

Current

Answer

Frequency

Answer

Power factor

Question 2

According to Kirchhoff's Current Law, what is the sum of currents entering a node?

Accepted Answer

Equal to the sum of currents leaving the node

Answer

Always zero

Answer

Equal to the supply current

Answer

Dependent on the resistance values

Question 3

What is the resonant frequency of a series RLC circuit with L = 1 mH and C = 1 microfarad?

Accepted Answer

Approximately 5,033 Hz

Answer

Approximately 1,000 Hz

Answer

Approximately 159 Hz

Answer

Approximately 50,330 Hz

Question 4

What type of motor uses a commutator and brushes for operation?

Accepted Answer

DC motor

Answer

Induction motor

Answer

Synchronous motor

Answer

Stepper motor

Question 5

In a balanced three-phase system, what is the phase angle between consecutive phases?

Accepted Answer

120 degrees

Answer

90 degrees

Answer

60 degrees

Answer

180 degrees

Question 6

What is the power factor of a circuit with 500 W real power and 1000 VA apparent power?

Accepted Answer

0.5

Answer

1.0

Answer

0.25

Answer

2.0