What is the direction of the induced current?
What will happen if you increase the current in the motor? Answer : Increasing current means increasing frequency of the motor because current is directly proportional to rotations of the motor rotor...
Why does increase in current mean a decrease in voltage? Answer : This is because current flows from high potential to low potential to bring the two diffrent potential to unity , thus a reduced potential (voltage)...
What are three ways you can increase the strength of an electromagnet?
Self induced emf and Mutually induced emf Answer : (i) Self-induced e.m.f.: The e.m.f. induced in a coil due to the change of its own flux linked with it, is called self-induced e.m.f. (ii) Mutually induced e.m.f.: The e.m.f. induced in a coil due to the changing current in the neighbouring coil, is called mutually induced e.m.f. ...
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