UPPCL-JE Recruitment 2017 Quiz 9

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Question 1

The mutual inductance between two coils is……….. reluctance of magnetic path.

• Adirectly proportional to
• Binversely proportional to
• Cindependent of
• Dnone of the above

Question 2

After closing the switch in below figure,  the current will reach the steady with ±2% error value in about……….

• A 2 second
• B2.5 seconds
• C5 seconds
• D1 second

Question 3

An 8-H choke is carrying a current of 500 mA. The energy stored in the magnetic field is………..

• A1 J
• B0.5 J
• C2 J
• D4 J

Question 4

A magnetic circuit carries a flux Φ_i in the iron part and a flux Φ_g in the air gap. Then leakage co-efficient is

• AΦ_i / Φ_g 
• BΦ_g / Φ_i 
• CΦ_{i  x} Φ_g 
• Dnone of the above

Question 5

The reluctance of a magnetic circuit depends upon………

• Acurrent in the coil
• Bno. of turns of coil
• Cflux density in the circuit
• Dnone of the above

Question 6

The B-H curve of……. will not be a straight line.

• Aair
• Bcopper
• Cwood
• Dsoft iron

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