Magnetism and Electromagnetism Online Test – Multiple Choice Questions and Answers

1. What is the magnetomotive force in a 150-turn coil of wire with 2 A flowing through it?

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2. If positively charged particles enter with high velocity from the sky towards the earth, then the earths magnetic field will deflect them towards

3. Permeability is the inverse equivalent of which electrical term?

4. The motional e.m.f. induced in a coil is independent of

5. What is the reluctance of a material that has a length of 0.045 m, a cross-sectional area of 0.015 m2 , and a permeability of 2500 µWb/At·m?

6. The unit of flux density is known as

7. The energy resides in a current carrying conductor in the form of

8. How much flux is there in a magnetic field when its flux density is 5000 mu.gifT and its cross-sectional area is 300 mm²?

9. A Hall effect sensor

10. The direction of induced current is given by?