Electromagnetic...

an equilateral triangular loop ADC having some resistance is pulled with a constant velocity v out of a uniform magnetic field directed into the paper. At time t=0, side DC of the loop is at edge of the magnetic field.The induced current I(i) versus time (t) graph will be

A vertical ring of radius r and resistance R falls vertically. it is in contact with two vertical rails which are joined at the top. The rails are without friction and resistance. There is a horizontal uniform magnetic field of magnitude B perpendicular to the plane of the ring and the rails. When the  speed of the ring is v, the current in the top horizontal of the rail section is 

A mutual inductor consists of two coils X and Y as shown in figure in which one quarter of the magnetic flux produced by X links with Y, giving a mutual inductance 'M'.
What will be the mutual inductance when Y is used as the primary?

The peak value of an alternating emf E given by 
               $$ E = E_0 \,cos\, \omega t $$ 
is $$ 10\,V $$ and frequency is $$ 50\,Hz $$ . At time $$ t = (1/600) \,s $$ , the instantaneous value of emf is 

Current in a coil of self-inductance 2.0 H is increasing as $$i=2\,sin\,t^2$$ . The amount of energy spent during the period when the current changes from 0 to 2 A is 

A uniform magnetic field of induction B is confined to a cylindrical region of radius R. The magnetic field is increasing at a constant rate of $$dB/dt Ts^{-1}$$. An electron placed at the point P on the periphery of the field, experiences an acceleration

 A conductor AB of length l moves in xy plane with velocity $$\overrightarrow {v}=v_0 (\hat {i} -\hat {j})$$ A magnetic field $$\overrightarrow {B}=B_0 (\hat {i} +\hat {j})$$ exists in the region. The induced emf is 

The phenomenon of electromagnetic induction is : 

The magnetic induction at the center $$O$$ in the figure shown is 

The magnetic induction due to an infinitely long straight wire carrying $$i$$ at a distance $$r$$ from wire is given by