Magnetism and Electromagnetism Online Test – Multiple Choice Questions and Answers

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

 
 
 
 

2. The unit of flux density is known as

 
 
 
 

3. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. 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?

 
 
 
 

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

 
 
 
 

9. The direction of induced current is given by?

 
 
 
 

10. A Hall effect sensor

 
 
 
 

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