Welcome to Series and Parallel Circuits NEET MCQ, In this curated collection of multiple-choice questions (MCQs), each question is thoughtfully accompanied by both the correct answer and a comprehensive explanation. Designed with NEET (National Eligibility-cum-Entrance Test) preparation in mind, these MCQs are here to not only assess your knowledge of series and parallel circuits but also to provide you with a deeper understanding of this fundamental topic.
1. In a series circuit, the total resistance (R_total) is:
Answer:
Explanation:
In a series circuit, the total resistance is the sum of all the individual resistances.
2. In a parallel circuit, how does the voltage across each component compare?
Answer:
Explanation:
In a parallel circuit, the voltage drop across each component is the same as the source voltage.
3. In a series circuit, if one component fails:
Answer:
Explanation:
In a series circuit, all components are connected in a single loop. If one fails, the entire circuit is broken.
4. In a parallel circuit, the total capacitance (C_total) is:
Answer:
Explanation:
In a parallel circuit, capacitors simply add up to give the total capacitance.
5. In a series circuit, the current:
Answer:
Explanation:
In a series circuit, the current remains consistent throughout all components.
6. Power dissipation in resistors is directly proportional to:
Answer:
Explanation:
Power (P) = V * I, so power dissipation is directly proportional to both current and voltage.
7. In a parallel circuit, if one component fails:
Answer:
Explanation:
In a parallel circuit, each component operates independently. If one fails, others continue working.
8. In a series RC circuit, the sum of the individual voltages across the resistor (V_R) and capacitor (V_C) is:
Answer:
Explanation:
According to Kirchhoff's voltage law, in a series circuit, the sum of the voltages across each component is equal to the source voltage.
9. Resistors are added to circuits to:
Answer:
Explanation:
Resistors are primarily used to limit or control the current flow in a circuit.
10. In a parallel RL circuit, the total current is:
Answer:
Explanation:
In a parallel RL circuit, currents through individual components are out of phase, hence their total is the vector sum.
11. The reciprocal of resistance is called:
Answer:
Explanation:
Conductance, denoted by 'G', is the reciprocal of resistance and measures how easily electricity flows through a component.
12. In a parallel circuit, the total resistance is:
Answer:
Explanation:
For parallel circuits, the reciprocal of total resistance is the sum of reciprocals of individual resistances.
13. The total reactance in a series LC circuit is:
Answer:
Explanation:
In a series LC circuit, the total reactance is the difference between inductive and capacitive reactance due to opposite phase angles.
14. In a series circuit with unequal resistances, the power dissipation is highest in the:
Answer:
Explanation:
Power dissipation in a resistor is P = I^2 * R. In a series circuit, current remains constant. Hence, power is directly proportional to resistance.
15. In a parallel circuit, resistors dissipate power. The total power dissipated in the circuit is the:
Answer:
Explanation:
Total power in a parallel circuit is the sum of power dissipated across each component.