name different type of microphone and their uses?
In an AC circuit,a solenoid is present. A bulb is connected at the end of the solenoid.
a)what happens when the swicth is on and off ?
b)lf an iron rod is inserted in the solenoid, what happens to the intensity of light?
c)lnstead of AC if DC is used, what happens during cases 'a' and 'b'.
d)which bulb shows more brightness,whether in AC or DC circuit?
what is mean by armature
which is the current responsible in DC generator?
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