Questions in emi

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	In an induction coil, the secondary e.m.f. is
	The number of turns in the coil of an ac¬ generator is 5000 and the area of the coil is $0.25\,{m^2}$. The coil is rotated at the rate of 100 cycles/sec in a magnetic field of $0.2 W/{m^2}$. The peak value of the emf generated is nearly
	In a dc motor, induced e.m.f. will be maximum
	Work of electric motor is
	In an induction coil with resistance, the induced emf will be maximum when
	An electric motor operating on a 60 V dc supply draws a current of 10 A. If the efficiency of the motor is 50%, the resistance of its winding is
	A device which converts electrical energy into mechanical energy is
	An electric motor operates on a 50 volt supply and a current of 12A. If the efficiency of the motor is 30%, what is the resistance of the winding of the motor
	A motor having an armature of resistance $2\Omega $ is designed to operate at 220 V mains. At full speed, it develops a back e.m.f. of 210V. When the motor is running at full speed, the current in the armature is
	Fan is based on