Series and parallel circuits MCQs January 8, 2026November 19, 2024 by u930973931_answers 15 min Score: 0 Attempted: 0/15 Subscribe 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 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) 60 Ω (C) 30 Ω (D) 20 Ω 3. If a resistor in a series circuit is removed or fails, what happens to the current in the circuit? (A) The current stops (B) The current decreases (C) The current increases (D) The current remains unaffected 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) 10 V (B) 4 V (C) 6 V (D) 2 V 5. In a series circuit, which of the following is true? (A) The total current is the sum of individual currents (B) The voltage across each resistor is equal (C) The total resistance is inversely proportional to the sum of individual resistances (D) 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) Zero (C) The same (D) Dependent on the resistance of each component 7. If resistors of 10 Ω, 20 Ω, and 30 Ω are connected in parallel, the total resistance is: (A) 60 Ω (B) 4.29 Ω (C) 10 Ω (D) 1.25 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 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) 20 Ω (B) 10 Ω (C) 5 Ω (D) 15 Ω 10. The total current in a parallel circuit is: (A) The current across the entire circuit is the same as through each resistor (B) The same as the current through the largest resistor (C) The sum of the individual currents through each branch (D) The sum of the voltages across 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 12. Which of the following is true for a parallel circuit? (A) The total current is the same throughout the circuit (B) The current through each resistor is the same (C) The total resistance increases as more components are added (D) 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) Neither series nor parallel circuits (B) Parallel circuit (C) Both series and parallel circuits (D) 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 15. What happens to the total current in a parallel circuit if more branches are added? (A) It decreases (B) It remains constant (C) It increases (D) It becomes zero