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. Permeability is the inverse equivalent of which electrical term?

3. The unit of flux density is known as

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

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

6. A Hall effect sensor

7. The direction of induced current is given by?

8. 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?

9. 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?

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