1. 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.
2. 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.
3. What is the unit of electrical charge?
,A. Coulomb
B. Ampere
C. Ohm
D. Volt
Answer: a) Coulomb
Rationale: The unit of electrical charge is the coulomb (C), which
represents the amount of charge transported by a current of one
ampere over one second.
4. Which of the following best describes a capacitor in an AC circuit?
A. It opposes changes in voltage
B. It opposes changes in current
C. It stores energy in a magnetic field
D. It stores energy in an electric field
Answer: d) It stores energy in an electric field
Rationale: A capacitor stores energy in the form of an electric field
when voltage is applied across its plates.
5. The unit of electric potential (voltage) is:
A. Ampere
B. Volt
C. Ohm
, D. Watt
Answer: b) Volt
Rationale: Voltage is measured in volts (V), representing the difference
in electric potential between two points.
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. Which of the following components can be used to store electrical
energy?
A. Resistor
B. Capacitor
C. Inductor
D. Diode
Answer: b) Capacitor
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.
2. 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.
3. What is the unit of electrical charge?
,A. Coulomb
B. Ampere
C. Ohm
D. Volt
Answer: a) Coulomb
Rationale: The unit of electrical charge is the coulomb (C), which
represents the amount of charge transported by a current of one
ampere over one second.
4. Which of the following best describes a capacitor in an AC circuit?
A. It opposes changes in voltage
B. It opposes changes in current
C. It stores energy in a magnetic field
D. It stores energy in an electric field
Answer: d) It stores energy in an electric field
Rationale: A capacitor stores energy in the form of an electric field
when voltage is applied across its plates.
5. The unit of electric potential (voltage) is:
A. Ampere
B. Volt
C. Ohm
, D. Watt
Answer: b) Volt
Rationale: Voltage is measured in volts (V), representing the difference
in electric potential between two points.
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. Which of the following components can be used to store electrical
energy?
A. Resistor
B. Capacitor
C. Inductor
D. Diode
Answer: b) Capacitor
