1. 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
Answer: b) Increase
Rationale: In a parallel circuit, adding resistance to one path increases
the total resistance slightly, but the current tends to increase because
other paths for current are available.
2. In a parallel circuit, if one resistor is removed, what happens to the
total resistance?
A. It increases
B. It decreases
C. It remains the same
D. It becomes zero
Answer: a) It increases
Rationale: In a parallel circuit, removing a resistor increases the total
resistance since fewer paths are available for current.
,3. What does a multimeter measure?
A. Only current
B. Only voltage
C. Current, voltage, and resistance
D. Only power
Answer: c) Current, voltage, and resistance
Rationale: A multimeter is a versatile tool that can measure voltage,
current, and resistance in electrical circuits.
4. In a parallel circuit, if the voltage across all components is the same,
the total current is:
A. The sum of the voltages
B. The sum of the currents
C. The average of the currents
D. Equal to the voltage across the components
Answer: b) The sum of the currents
Rationale: In a parallel circuit, the total current is the sum of the
currents flowing through each branch.
5. What is the function of an inductor in a circuit?
A. To store electrical energy in the form of a magnetic field
B. To store energy in the form of an electric field
, C. To increase current
D. To change AC to DC
Answer: a) To store electrical energy in the form of a magnetic field
Rationale: An inductor stores energy in a magnetic field when current
flows through it, opposing changes in current.
6. The main function of an electrical transformer is to:
A. Store electrical energy
B. Convert AC to DC
C. Change voltage levels
D. Regulate current flow
Answer: c) Change voltage levels
Rationale: Transformers are used to step up or step down the voltage
levels in alternating current circuits.
7. What happens to the current in a series circuit if one of the
components fails?
A. The current increases
B. The current decreases
C. The circuit is broken and current stops
D. The current remains constant
Answer: c) The circuit is broken and current stops
total current in the circuit will:
A. Decrease
B. Increase
C. Stay the same
D. Become zero
Answer: b) Increase
Rationale: In a parallel circuit, adding resistance to one path increases
the total resistance slightly, but the current tends to increase because
other paths for current are available.
2. In a parallel circuit, if one resistor is removed, what happens to the
total resistance?
A. It increases
B. It decreases
C. It remains the same
D. It becomes zero
Answer: a) It increases
Rationale: In a parallel circuit, removing a resistor increases the total
resistance since fewer paths are available for current.
,3. What does a multimeter measure?
A. Only current
B. Only voltage
C. Current, voltage, and resistance
D. Only power
Answer: c) Current, voltage, and resistance
Rationale: A multimeter is a versatile tool that can measure voltage,
current, and resistance in electrical circuits.
4. In a parallel circuit, if the voltage across all components is the same,
the total current is:
A. The sum of the voltages
B. The sum of the currents
C. The average of the currents
D. Equal to the voltage across the components
Answer: b) The sum of the currents
Rationale: In a parallel circuit, the total current is the sum of the
currents flowing through each branch.
5. What is the function of an inductor in a circuit?
A. To store electrical energy in the form of a magnetic field
B. To store energy in the form of an electric field
, C. To increase current
D. To change AC to DC
Answer: a) To store electrical energy in the form of a magnetic field
Rationale: An inductor stores energy in a magnetic field when current
flows through it, opposing changes in current.
6. The main function of an electrical transformer is to:
A. Store electrical energy
B. Convert AC to DC
C. Change voltage levels
D. Regulate current flow
Answer: c) Change voltage levels
Rationale: Transformers are used to step up or step down the voltage
levels in alternating current circuits.
7. What happens to the current in a series circuit if one of the
components fails?
A. The current increases
B. The current decreases
C. The circuit is broken and current stops
D. The current remains constant
Answer: c) The circuit is broken and current stops
