Lenz's Law
Lenz's law ensures induced current direction opposes:
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Lenz's law gives direction of induced current such that it?
Lenz's law gives direction of induced current such that it?
Eddy currents are induced circulating currents leading to:
Eddy currents are induced circulating currents leading to:
High Q factor in resonant circuit implies:
High Q factor in resonant circuit implies:
At resonance in series RLC circuit current is maximum because:
At resonance in series RLC circuit current is maximum because:
Magnitude of impedance Z of series RLC at angular frequency ω is:
Magnitude of impedance Z of series RLC at angular frequency ω is:
Instantaneous AC voltage form V = V0 sin(ω t) has rms value:
Instantaneous AC voltage form V = V0 sin(ω t) has rms value:
Inductive reactance X_L in AC of angular frequency ω is:
Inductive reactance X_L in AC of angular frequency ω is:
Average power in AC circuit with Vrms, Irms and phase angle φ is:
Average power in AC circuit with Vrms, Irms and phase angle φ is:
Induced EMF magnitude equals rate of change of:
Induced EMF magnitude equals rate of change of:
Capacitive reactance X_C is:
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Rod length ℓ moving perpendicular to B with speed v. Induced EMF is:
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About This Question
- Subject
- physics
- Chapter
- electromagnetic induction and ac
- Topic
- lenz's law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Change causing it
Lenz's Law provides the direction of the induced EMF: 'The direction of the induced EMF is such that it would tend to produce a current that opposes the change in magnetic flux that created it.'
- This is a consequence of the Law of Conservation of Energy.
- If the induced current supported the change, energy could be created out of nothing. The negative sign in Faraday's equation (E=−dΦ/dt) reflects this law.
This easy difficulty physics question is from the chapter electromagnetic induction and ac, covering the topic of lenz's law. It appeared in the 2025 exam.
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