ACTIVE AND PASSIVE COMPONENTS - Practice Mode

1) Which meter is used to find the exact resistance value of resistors?

Ammeter Volt meter Ohm meter Watt meter

Correct Answer: Ohm meter

2) What is the cause of burnt relay contacts?

Low contact current Excessive contact current Chatter during a slow release Excessive number of operations

Correct Answer: Excessive contact current

3) 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

Correct Answer: Lamp is OFF at room temperature

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

Back emf increases Eddy current decreases Magnetic flux increases Energy loss takes place

Correct Answer: Energy loss takes place

5) 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

Correct Answer: Voltage leads current by 45 Degree

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