Questions in emi

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	An e.m.f. of 12 volts is induced in a given coil when the current in it changes at the rate of 48 amperes per minute. The self inductance of the coil is
	A closely wound coil of 100 turns and area of cross-section $1\;c{m^2}$ has a coefficient of self-induction 1 mH. The magnetic induction in the centre of the core of the coil when a current of 2A flows in it, will be
	Two circuits have coefficient of mutual induction of 0.09 henry. Average e.m.f. induced in the secondary by a change of current from 0 to 20 ampere in 0.006 second in the primary will be
	In the following circuit, the bulb will become suddenly bright if
	Two pure inductors each of self inductance L are connected in parallel but are well separated from each other. The total inductance is
	A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then
	Self induction of a solenoid is
	Mutual inductance of two coils can be increased by
	The self inductance of a coil is 5 henry, a current of 1 amp change to 2 amp within 5 second through the coil. The value of induced e.m.f. will be
	The unit of inductance is