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Electronic Mechanic
Electronic Mechanic Set-1
Active and Passive Components
12

Active and Passive Components MCQ with Answers

12) What is the cause of burnt relay contacts?

Low contact current

Excessive contact current

Chatter during a slow release

Excessive number of operations

Answer is:

Excessive contact current

Active and Passive Components MCQ with Answers

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Related Active and Passive Components MCQ with Answers

13) At which condition the cold resistance of the low voltage lamp is measured using ohmmeter?

Lamp is ON at 100 Degree Centigrade

Lamp is ON at 320 Degree Centigrade

Lamp is ON at 400 Degree Centigrade

Lamp is OFF at room temperature

Answer is:

Lamp is OFF at room temperature

14) What is the result of hysteresis loss in magnetic material?

Back emf increases

Eddy current decreases

Magnetic flux increases

Energy loss takes place

Answer is:

Energy loss takes place

15) What is the phase relationship between the applied voltage and current in the primary of a transformer with open secondary winding?

Voltage lags current by 45 Degree

Current lags voltage by 90 Degree

Voltage leads current by 45 Degree

Current leads voltage by 90 Degree

Answer is:

Voltage leads current by 45 Degree

16) What is the purpose of trimmer capacitor?

Coupling

Filtering

Decoupling

Fine tuning

Answer is:

Fine tuning

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