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Answer Posted / prayank gupta
faraday's law states that E=∫(dф/dt)
Hypothetically an ideal transformer would work with direct-
current excitation, with the core flux increasing linearly
with time. In practice, the flux would rise to the point
where magnetic saturation of the core occurs, causing a
huge increase in the magnetizing current and overheating
the transformer. All practical transformers must therefore
operate with alternating (or pulsed) current
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