Questions in emi

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	In a primary coil 5A current is flowing on 220 volts. In the secondary coil 2200V voltage produces. Then ratio of number of turns in secondary coil and primary coil will be
	A step up transformer has transformation ration $5 : 3$. What is voltage in secondary if voltage in primary is 60 V
	In a step up transformer, 220 V is converted into 200 V. The number of turns in primary coil is 600. What is the number of turns in the secondary coil
	The output voltage of a transformer connected to 220 volt line is 1100 volt at 1 amp current. Its efficiency is 100%. The current coming from the line is
	Quantity that remains unchanged in a transformer is
	In a region of uniform magnetic induction $B = {10^{ - 2}}\,tesla$, a circular coil of radius 30 cm and resistance $\pi ^2 ohm$ is rotated about an axis which is perpendicular to the direction of B and which forms a diameter of the coil. If the coil rotates at 200 rpm the amplitude of the alternating current induced in the coil is
	In a transformer, the number of turns in primary and secondary are 500 and 2000 respectively. If current in primary is 48 A, the current in the secondary is
	In an inductor of inductance L = 100 mH, a current of $I = 10A$ is flowing. The energy stored in the inductor is
	The turn ratio of a transformers is given as $2 : 3$. If the current through the primary coil is 3 A, thus calculate the current through load resistance
	Core of transformer is made up of