Introduction to Electrical Engineering MCQs (Part-4)

What is the unit of electrical power?

A Watt
B Ampere
C Ohm
D Volt

What is the effect of increasing resistance in a circuit?

A Increases power
B No effect
C Decreases current
D Increases current

What type of current is commonly used in homes?

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

What is the function of a fuse in a circuit?

A To measure current
B To increase current
C To control voltage
D To protect from overload

What does the electric potential of a charge depend on?

A Current
B Voltage
C Distance
D Resistance

What does the symbol “Ω” represent in a circuit?

A Resistance
B Power
C Voltage
D Current

Which of the following components stores energy in a magnetic field?

A Transistor
B Capacitor
C Inductor
D Resistor

What is the purpose of a circuit diagram?

A To calculate resistance
B To represent a circuit’s layout
C To show voltage levels
D To show current

What does a capacitor do in a DC circuit?

A Stores energy
B Controls current
C Reduces resistance
D Increases voltage

What does the term “electrical load” refer to?

A The current flowing through a circuit
B The voltage across a circuit
C The resistance of a circuit
D The devices using electrical energy

What is the relationship between current and voltage in an ohmic conductor?

A Directly proportional
B Inversely proportional
C Directly proportional to power
D Unrelated

What is the purpose of an electrical circuit’s ground?

A To store electrical energy
B To increase current
C To reduce voltage
D To provide a safe path for current

What does a voltage source do in a circuit?

A Reduces voltage
B Provides resistance
C Supplies electrical energy
D Increases current

Which component is used to vary the resistance in a circuit?

A Diode
B Potentiometer
C Resistor
D Capacitor

What does a multimeter measure?

A Voltage
B Resistance
C Current
D All of the above