1. What is the effect of increasing the temperature on the resistance of a
conductor?
A. Increases resistance
B. Decreases resistance
C. No effect
D. Causes current to reverse direction
Answer: a) Increases resistance
Rationale: As temperature increases, the atoms in the conductor vibrate
more, hindering the flow of electrons, thus increasing resistance.
2. What is the primary function of a fuse in an electrical circuit?
A. To store energy
B. To protect the circuit from overload
C. To increase current flow
D. To regulate voltage
Answer: b) To protect the circuit from overload
Rationale: A fuse is designed to melt and break the circuit if the current
exceeds a safe level, preventing damage to the electrical components.
3. What type of current does a battery provide?
,A. Alternating Current (AC)
B. Direct Current (DC)
C. Both AC and DC
D. None of the above
Answer: b) Direct Current (DC)
Rationale: A battery provides direct current (DC), where current flows
in one direction.
4. What is the potential difference across a resistor in a circuit if the
current is 2A and the resistance is 4Ω?
A. 0.5V
B. 4V
C. 8V
D. 2V
Answer: c) 8V
Rationale: Using Ohm’s law, V=I×RV = I \times RV=I×R,
V=2A×4Ω=8VV = 2A \times 4Ω = 8VV=2A×4Ω=8V.
5. Which of the following correctly represents the unit of electrical
charge?
A. Ampere
B. Coulomb
, C. Volt
D. Watt
Answer: b) Coulomb
Rationale: The unit of electrical charge is the coulomb (C), which is the
amount of charge transported by a current of one ampere in one
second.
6. What is the primary purpose of grounding an electrical circuit?
A. To increase the resistance
B. To prevent electric shock
C. To increase the current
D. To reduce power loss
Answer: b) To prevent electric shock
Rationale: Grounding provides a safe path for excess current to flow
into the Earth, preventing electric shocks and reducing the risk of
electrical fires.
7. In a parallel circuit, if the resistance of one resistor is increased, the
total current in the circuit will:
A. Decrease
B. Increase
C. Stay the same
D. Become zero
conductor?
A. Increases resistance
B. Decreases resistance
C. No effect
D. Causes current to reverse direction
Answer: a) Increases resistance
Rationale: As temperature increases, the atoms in the conductor vibrate
more, hindering the flow of electrons, thus increasing resistance.
2. What is the primary function of a fuse in an electrical circuit?
A. To store energy
B. To protect the circuit from overload
C. To increase current flow
D. To regulate voltage
Answer: b) To protect the circuit from overload
Rationale: A fuse is designed to melt and break the circuit if the current
exceeds a safe level, preventing damage to the electrical components.
3. What type of current does a battery provide?
,A. Alternating Current (AC)
B. Direct Current (DC)
C. Both AC and DC
D. None of the above
Answer: b) Direct Current (DC)
Rationale: A battery provides direct current (DC), where current flows
in one direction.
4. What is the potential difference across a resistor in a circuit if the
current is 2A and the resistance is 4Ω?
A. 0.5V
B. 4V
C. 8V
D. 2V
Answer: c) 8V
Rationale: Using Ohm’s law, V=I×RV = I \times RV=I×R,
V=2A×4Ω=8VV = 2A \times 4Ω = 8VV=2A×4Ω=8V.
5. Which of the following correctly represents the unit of electrical
charge?
A. Ampere
B. Coulomb
, C. Volt
D. Watt
Answer: b) Coulomb
Rationale: The unit of electrical charge is the coulomb (C), which is the
amount of charge transported by a current of one ampere in one
second.
6. What is the primary purpose of grounding an electrical circuit?
A. To increase the resistance
B. To prevent electric shock
C. To increase the current
D. To reduce power loss
Answer: b) To prevent electric shock
Rationale: Grounding provides a safe path for excess current to flow
into the Earth, preventing electric shocks and reducing the risk of
electrical fires.
7. In a parallel circuit, if the resistance of one resistor is increased, the
total current in the circuit will:
A. Decrease
B. Increase
C. Stay the same
D. Become zero
