Eddy Currents
Eddy currents are?
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More em induction and ac Practice Questions
In the design of transformer cores and electromagnetic braking systems, why are the metallic cores c...
In the design of transformer cores and electromagnetic braking systems, why are the metallic cores c...
An induction stovetop heats a flat-bottomed steel pan placed over its coil while a similar glass dis...
An induction stovetop heats a flat-bottomed steel pan placed over its coil while a similar glass dis...
Eddy currents are induced circulating currents leading to:
Eddy currents are induced circulating currents leading to:
Time constant τ for RL circuit (R, L) equals?
Time constant τ for RL circuit (R, L) equals?
Ideal transformer relation between voltages and turns: Vp/Vs = ?
Ideal transformer relation between voltages and turns: Vp/Vs = ?
For i = I0 sin ωt, RMS current equals?
For i = I0 sin ωt, RMS current equals?
Average power in AC circuit P_avg equals?
Average power in AC circuit P_avg equals?
Resonant angular frequency ω0 in series RLC circuit?
Resonant angular frequency ω0 in series RLC circuit?
Power factor of AC circuit equals?
Power factor of AC circuit equals?
Mutual inductance between two coils depends on?
Mutual inductance between two coils depends on?
AC generator works on principle of?
AC generator works on principle of?
Self-induced emf in coil ε = -L (dI/dt). L depends on?
Self-induced emf in coil ε = -L (dI/dt). L depends on?
About This Question
- Subject
- physics
- Chapter
- em induction and ac
- Topic
- eddy currents
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Localized circulating induced currents in conductors
- Origin: When a solid sheet or bulk piece of conductor is placed in a changing magnetic flux, emf is induced throughout the volume.
- Flow: Unlike wires, the current flows in closed circulating paths (like eddies in water) within the body of the conductor.
- Effects:
- Heating: Causes significant energy loss (Joule heating).
- Damping: Produces a braking effect by Lenz's Law (used in electromagnetic brakes).
- Reduction: Minimized by using laminated cores in transformers and motors to break the large current loops into smaller, high-resistance paths.
This medium difficulty physics question is from the chapter em induction and ac, covering the topic of eddy currents. It appeared in the 2025 exam.
Looking for more practice? Explore all physics questions or browse em induction and ac questions on RankGuru.