Class 4 (4th Engineer) MET 📅 Jun 2023

Exam Question

(a) Explain Fleming's Right hand rule. (6)

(b) A one-turn armature coil has an axial length of 0.4m and a diameter of 0.2m. It is rotated at a speed of 500 rev/min in a field of uniform flux density of 1.2T. Calculate the magnitude of the e.m.f. induced in the coil. (10)

Reference Answer

### (a) Explanation of Fleming's Right-Hand Rule
Fleming's Right-Hand Rule, often referred to as the "Dynamo Rule," is a fundamental principle in electromagnetism used to determine the direction of the induced electromotive force (e.m.f.) or current when a conductor moves within a magnetic field. It is an essential concept for understanding the operation of electrical generators (dynamos).
#### Principles and Application:
1. **Purpose**: The rule provides a mnemonic to relate the direction of the magnetic field, the motion of the conductor, and the resulting induced current.

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