Questions in emi

Select	Question
	Dynamo is a device for converting
	The working of dynamo is based on principle of
	Choke coil works on the principle of
	When the speed of a dc motor increases the armature current
	The output of a dynamo using a splitting commutator is
	Which of the following statement is incorrect
	The coil of dynamo is rotating in a magnetic field. The developed induced e.m.f. changes and the number of magnetic lines of force also changes. Which of the following condition is correct
	Dynamo core is laminated because
	Armature current in dc motor will be maximum when
	The armature of dc motor has $20\,\Omega $ resistance. It draws current of 1.5 ampere when run by 220 volts dc supply. The value of back e.m.f. induced in it will be