1. In a series circuit, the current flowing through all components is:
A. Different
B. The same
C. Zero
D. Dependent on the resistance of each component
Answer: B. The same
2. In a series circuit, the total resistance is the sum of the individual resistances. If three resistors with values 10 Ω, 20 Ω, and 30 Ω are connected in series, the total resistance will be:
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 60 Ω
Answer: D. 60 Ω
3. If a resistor in a series circuit is removed or fails, what happens to the current in the circuit?
A. The current increases
B. The current decreases
C. The current stops
D. The current remains unaffected
Answer: C. The current stops
4. In a series circuit, if the voltage across one resistor is 6 V and the voltage across another is 4 V, the total voltage across the circuit will be:
A. 6 V
B. 4 V
C. 10 V
D. 2 V
Answer: C. 10 V
5. In a series circuit, which of the following is true?
A. The total voltage is shared by each resistor in proportion to their resistance
B. The voltage across each resistor is equal
C. The total resistance is inversely proportional to the sum of individual resistances
D. The total current is the sum of individual currents
Answer: A. The total voltage is shared by each resistor in proportion to their resistance
6. In a parallel circuit, the voltage across all components is:
A. Different
B. The same
C. Zero
D. Dependent on the resistance of each component
Answer: B. The same
7. If resistors of 10 Ω, 20 Ω, and 30 Ω are connected in parallel, the total resistance is:
A. 60 Ω
B. 10 Ω
C. 4.29 Ω
D. 1.25 Ω
Answer: C. 4.29 Ω
8. In a parallel circuit, if one resistor is removed or fails, what happens to the current in the circuit?
A. The current decreases in all other branches
B. The current stops entirely
C. The current continues in the remaining branches
D. The current increases in all branches
Answer: C. The current continues in the remaining branches
9. In a parallel circuit, if one of the resistors has a resistance of 10 Ω and the total resistance is 5 Ω, the resistance of the other resistors must be:
A. 5 Ω
B. 10 Ω
C. 20 Ω
D. 15 Ω
Answer: C. 20 Ω
10. The total current in a parallel circuit is:
A. The sum of the individual currents through each branch
B. The same as the current through the largest resistor
C. The current across the entire circuit is the same as through each resistor
D. The sum of the voltages across each branch
Answer: A. The sum of the individual currents through each branch
11. Which of the following is true for a series circuit?
A. The total resistance is less than the smallest resistor in the circuit
B. The voltage across each component is equal
C. The current through each component is the same
D. The total current is the sum of individual currents
Answer: C. The current through each component is the same
12. Which of the following is true for a parallel circuit?
A. The total current is the same throughout the circuit
B. The voltage across each component is the same
C. The total resistance increases as more components are added
D. The current through each resistor is the same
Answer: B. The voltage across each component is the same
13. In which type of circuit will the total resistance always increase if more resistors are added?
A. Series circuit
B. Parallel circuit
C. Both series and parallel circuits
D. Neither series nor parallel circuits
Answer: A. Series circuit
14. If two resistors are connected in series and parallel, which configuration will have a lower total resistance?
A. Series configuration
B. Parallel configuration
C. Both will have the same resistance
D. Neither configuration affects the total resistance
Answer: B. Parallel configuration
15. What happens to the total current in a parallel circuit if more branches are added?
A. It decreases
B. It increases
C. It remains constant
D. It becomes zero
Answer: B. It increases