Atomic hydrogen has a life period of
A). One hour
B). One day
C). One minute
D). A fraction of a second
Transformer is a device to convert
A). D.C. to A.C.
B). Low voltage D.C. into high voltage D.C.
C). Low voltage A.C. into high voltage A.C.
D). Mechanical energy into Electrical energy
A transformer works on the principle of
A). Self induction
B). Mutual induction
C). Generator
D). Inverter
The best material for the core of a transformer is
A). Stainless steel
B). Mild steel
C). Hard steel
D). Soft iron
The best material for the core of a transformer is
A). Stainless steel
B). Mild steel
C). Hard steel
D). Soft iron