A transformer transforms

A)
Voltage
B)
Current
C)
Frequency
D)
Current and voltage

Correct Answer : Option (D) :   Current and voltage

Explanation : The transformer is a static electromechanical device that works on the principle of mutual induction. Transformer transforms:

Voltage : nU2 = Nu1, where U2 being the secondary side and U1 the primary side.

Current : I2 = I1/n, so when voltage is increased, the current is decreased.

Recently Updated in Transformers Questions
Which of the following parts of a transformer is visible from outside?
A)
Core
B)
Bushings
C)
Primary winding
D)
Secondary winding

Correct Answer :   Bushings

A no-load test is performed on a transformer to determine
A)
efficiency
B)
copper loss
C)
magnetising current
D)
magnetising current and loss

Correct Answer :   magnetising current and loss

Natural oil cooling is used for transformers up to a rating of
A)
250 kVA
B)
500 kVA
C)
1000 kVA
D)
3000 kVA

Correct Answer :   3000 kVA

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