Questions in emi

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	A coil of N = 100 turns carries a current I = 5 A and creates a magnetic flux $\varphi = {10^{ - 5}}T{m^{ - 2}}$ per turn. The value of its inductance L will be
	Two identical induction coils each of inductance L joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other, what is the net inductance
	If the current 30 A flowing in the primary coil is made zero in 0.1 sec. The emf induced in the secondary coil is 1.5 volt. The mutual inductance between the coil is
	Eddy currents are used in
	The adjoining figure shows two bulbs $B_1$ and $B_2$ resistor $R$ and an inductor $L$. When the switch S is turned off
	In L-R circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula
	An inductance L and a resistance R are first connected to a battery. After some time the battery is disconnected but L and R remain connected in a closed circuit. Then the current reduces to 37% of its initial value in
	In an LR-circuit, time constant is that time in which current grows from zero to the value (where ${I_0}$ is the steady state current)
	In the figure magnetic energy stored in the coil is
	A capacitor is fully charged with a battery. Then the battery is removed and coil is connected with the capacitor in parallel, current varies as