NEET Physics: Electromagnetism Practice Questions
15 free multiple-choice questions on Electromagnetism for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more Electromagnetism questions in the app →Q1. Mutual inductance arises when:
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Correct answer: D — The magnetic field of one coil links the other coil.
Mutual inductance occurs when a change in current in one coil induces a change in magnetic flux linkage in another coil.
Q2. What is the definition of self-inductance of an inductor?
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Correct answer: A — The magnetic flux linked with the coil per unit current.
Self-inductance is the property of an inductor to oppose changes in the current flowing through it. It is a measure of the magnetic flux linkage produced by the current flowing through the coil itself.
Q3. In an ideal inductor, the magnetic energy stored depends only on the inductance and the square of the current. This property is essential for calculating:
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Correct answer: C — Inductive energy
The energy stored in an inductor is proportional to L I².
Q4. In a series LCR circuit connected to an AC source, the voltage across the inductor (V_L) leads the current (I) by a certain phase angle. What is the phase difference between the voltage across the inductor and the current flowing through it?
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Correct answer: B — π/2 radians
In an inductor, the voltage across it is proportional to the rate of change of current, meaning the voltage leads the current by a phase angle of π/2 radians (or 90°).
Q5. The self-inductance of an inductor is defined by the ratio of magnetic flux linkage to the current flowing through it. If the magnetic flux linkage and the current are kept constant, what happens to the inductance of the coil?
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Correct answer: D — It remains unchanged
Inductance (L) is a property of the coil itself relating the induced EMF to the current. If the magnetic flux linkage and current are held constant, the inductance value remains unchanged by this specific definition.
Q6. What is the unit of self-inductance (inductance) in the SI system?
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Correct answer: D — Henry (H)
The SI unit of inductance is the Henry (H). One Henry is equal to one Weber per Ampere (Wb/A).
Q7. The SI unit of self-inductance is:
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Correct answer: D — Henry
Self-inductance is measured in Henry (H). Henry is the unit of inductance (L).
Q8. In an ideal inductor connected to an AC source, the induced EMF is proportional to the rate of change of the magnetic flux linkage. This relationship is quantified by the concept of inductance. What is the SI unit of self-inductance (L)?
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Correct answer: B — Henry
Self-inductance (L) is the property of an inductor to oppose changes in current flow. The unit for inductance (magnetic flux linkage per unit current) is the Henry (H).
Q9. The self-inductance of a coil is a measure of:
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Correct answer: A — the magnetic flux linkage induced by the coil itself
Self-inductance (L) is the property of a coil to oppose changes in the current flowing through it, which is directly related to the magnetic flux linkage induced by the current itself.
Q10. Mutual inductance between two coils is defined by the magnetic flux linkage between them. If the magnetic field in one coil is doubled, the mutual inductance between the two coils will:
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Correct answer: D — Be doubled
Mutual inductance depends directly on the magnetic flux linkage. If the flux is doubled, the mutual inductance is also doubled.
Q11. In a purely inductive AC circuit, the voltage across the inductor leads the current by what phase angle?
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Correct answer: D — π/2 radians
In an ideal inductor, the voltage across it leads the current by a phase angle of π/2 radians (or 90°). This is a fundamental property of inductor behavior in AC circuits.
Q12. If the magnetic flux linking two coils changes by ΔΦ, the mutual inductance (M) between them is defined as the ratio of the change in magnetic flux to the current in the other coil. What is the unit of mutual inductance in SI units?
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Correct answer: B — Henry (H)
Mutual inductance (M) is measured in Henrys (H), which is the SI unit for inductance. Since inductance is a measure of flux linkage per unit current, the SI unit is Henry.
Q13. The property of an inductor to oppose any change in the current flowing through it is known as:
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Correct answer: A — Inductance
Inductance is the property of an inductor to oppose changes in the magnetic flux linkage, which results in an induced EMF (Lenz's Law).
Q14. The self-inductance of an inductor is a measure of:
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Correct answer: D — the magnetic flux linkage generated in the coil due to the current flowing through it
Self-inductance (L) is defined by the relationship between the magnetic flux linkage (Φ) and the current (I) flowing through the coil (L = Φ/I).
Q15. If two coils have a mutual inductance of zero, what is the relationship between their magnetic fluxes?
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Correct answer: C — Their fluxes are independent
If mutual inductance (M) is zero, the magnetic fluxes linked by the two coils are independent of each other.
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