Class 4 (4th Engineer) MET 📅 Jan 2024

Exam Question

(a) Briefly explain Static Induction and dynamic Induction. (6)

(b) A coil of 250 turns is wound uniformly over a wooden ring of mean circumference 500mm and uniform cross-sectional area of 400mm2. If the current passed through the coil is 4A find (10)

(i) the magnetizing force

(ii) the total flux.

Reference Answer

### Part (a): Static and Dynamic Induction
#### 1. Statically Induced EMF
A Statically Induced EMF is generated when the conductor remains stationary, but the magnetic field linking with it changes with time. This phenomenon is a direct application of Faraday's Law of Electromagnetic Induction, where the induced EMF is proportional to the rate of change of magnetic flux linkage ($$e = -N \frac{d\Phi}{dt}$$).
**Key Characteristics:**

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