Welcome to Physics Inductance NEET MCQ, In this collection of multiple-choice questions (MCQs), each question is thoughtfully paired with not only the correct answer but also a comprehensive explanation. Specifically designed for NEET (National Eligibility-cum-Entrance Test) preparation, these MCQs serve to both assess your knowledge of inductance and provide you with an in-depth understanding of this crucial topic.
1. What does inductance primarily depend on?
Answer:
Explanation:
Inductance mainly depends on the number of turns in a coil. Although other factors can influence it, the number of turns plays a significant role.
2. The SI unit of inductance is:
Answer:
Explanation:
The standard unit for inductance is the Henry, named after Joseph Henry.
3. Self-inductance is a phenomenon in which:
Answer:
Explanation:
Self-inductance refers to the property where a changing magnetic field within a coil induces an electromotive force (EMF) in that same coil.
4. Mutual inductance is best described by which of the following?
Answer:
Explanation:
Mutual inductance occurs when a change in current in one coil induces a voltage in another nearby coil.
5. Which of the following materials would enhance the inductance of a coil when used as its core?
Answer:
Explanation:
Iron, being a ferromagnetic material, increases the magnetic field and thus the inductance of the coil.
6. The inductance of a coil is inversely proportional to:
Answer:
Explanation:
The inductance decreases as the length of the coil increases, making them inversely proportional.
7. A coil has a self-inductance of 2 Henry. If the current changes at a rate of 3 A/s, the induced EMF will be:
Answer:
Explanation:
Induced EMF = L * (ΔI/Δt) = 2 * 3 = 6 V.
8. In a DC circuit, an ideal inductor behaves as:
Answer:
Explanation:
In a DC circuit, once steady state is reached, an ideal inductor offers no resistance and behaves as a short circuit.
9. Which component opposes the rapid change of current in a circuit?
Answer:
Explanation:
Due to its property of inductance, an inductor opposes rapid changes in current.
10. The energy stored in an inductor can be given by:
Answer:
Explanation:
The energy (W) stored in an inductor is given by W = (1/2) * L * I^2.
11. If the number of turns in a coil is doubled, its inductance will:
Answer:
Explanation:
Inductance is proportional to the square of the number of turns. Doubling the turns will quadruple the inductance.
12. An ideal inductor:
Answer:
Explanation:
An ideal inductor does not have resistance and does not dissipate energy as heat. It stores energy in its magnetic field.
13. The self-inductance of a coil is a measure of:
Answer:
Explanation:
Self-inductance measures how much a coil resists a change in the current flowing through it.
14. In AC circuits, inductors:
Answer:
Explanation:
Inductors offer higher impedance to lower frequencies in AC circuits, effectively blocking them.
15. The reactance of an inductor increases with:
Answer:
Explanation:
Inductive reactance (XL) is given by XL = 2πfL. As frequency (f) increases, the reactance increases.