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Answer Posted / mohamed sathik
mutual induction is the principle of transformer. on
applying dc on the primary wng there ll b no variation in
the flux linked with the secondary n primary windngs. ie no
emf induced in the secondary winding except at the time of
switching and so no output u get...v know that the wndg
resistance is low.. in normal case although we r applying a
high voltage, due to the self induced emf in primary wndg,
which opposes the applied voltage, the primary current is
limitted to a low value.. if the applied voltage is dc no
self inuced emf to oppose and hence leads to a heavy
primary current that causes burning out of primary windg
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