In
a transformer, energy is carried from the primary coil to the
secondary coil by
a transformer, energy is carried from the primary coil to the
secondary coil by
A. The magnetic field in the iron core
B. The electrical heating of the primary coil
C. Electricity conducted through the iron core
D. The difference in voltage between the primary and secondary
coils.
coils.
Answer
A. The magnetic field in the iron core
when current varies in primary coil, magnetic field
through the primary coil changes. so, magnetic field in secondary
coil also through iron core. so, emf is inuced in the secondary
coil.