Introduction to Electrical Engineering MCQs (Part-6)

What is the main difference between AC and DC?

A Current direction
B Circuit type
C Voltage level
D Power consumption

What is the function of a rectifier?

A Control current flow
B Store energy
C Convert AC to DC
D Convert DC to AC

What does the symbol “V” represent in electrical circuits?

A Resistance
B Voltage
C Power
D Current

Which component is used to measure electrical resistance?

A Wattmeter
B Ammeter
C Voltmeter
D Ohmmeter

What is the purpose of a fuse in an electrical circuit?

A To measure voltage
B To store energy
C To prevent overload
D To increase current

In a series circuit, how is the total resistance calculated?

A Add the resistances
B Multiply the resistances
C Divide the resistances
D Add the reciprocals

What is the unit of electrical power?

A Ohm
B Volt
C Watt
D Ampere

What does a capacitor do in an electrical circuit?

A Increase current
B Store charge
C Limit resistance
D Measure voltage

What happens to current in a parallel circuit if one branch is disconnected?

A Current stops
B Current decreases
C Current increases
D Current stays the same

What does a potentiometer control in a circuit?

A Power
B Voltage
C Resistance
D Current

What is the unit of electric current?

A Ampere
B Watt
C Volt
D Ohm

Which component blocks the flow of current in one direction?

A Inductor
B Diode
C Resistor
D Capacitor

What does Kirchhoff’s Voltage Law state?

A Power is conserved
B Total voltage is constant
C Total voltage in a loop is zero
D Current is conserved

What does an ammeter measure in an electrical circuit?

A Voltage
B Resistance
C Power
D Current

What type of current does a battery provide?

A Direct Current
B Alternating Current
C Pulsating Current
D High Frequency Current