MAGNETISM AND CAPACITORS - Practice Mode

1) What is the unit of Magneto Motive Force (MMF)?

Ampere / m<sup>2</sup> Ampere - m Ampere - turns Ampere / turns

Correct Answer: Ampere - turns

2) What is the unit of permeance?

Ampere - turns Weber/Ampere turns Ampere turns/Weber Weber/Square metre

Correct Answer: Weber/Ampere turns

3) Which rule is applied to find the direction of magnetic fields in a solenoid coil?

Cork screw rule Right hand palm rule Flemings left hand rule Flemings right hand rule

Correct Answer: Right hand palm rule

4) What precaution to be taken before connecting the different voltage rating capacitors in series?

All the capacitors must be same manufacturer Each capacitors voltage drop must be less than its voltage rating Total capacitors value must be less than the lowest value of capacitor Break down voltage of each capacitor must be same

Correct Answer: Each capacitors voltage drop must be less than its voltage rating

5) Which material is the paramagnetic substance?

Cleat wiring Copper Bismuth Graphite

Correct Answer: Copper

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