Magnetism and M...

A magnet of magnetic moment $$\bar M$$ moves with velocity $$\vec v$$ towards a magnet. Consider a small circular loop whose plane is normal to $$\vec v$$. Its radius $$r$$ is so small that magnetic induction is almost constant over it. Then :

Which of the following is correct representation of magnetic lines of force ?

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 square conducting loop, 20.0 cm on a side is placed in the same magnetic field as shown in Fig. Centre of the magnetic field region, where $$db/dt =0.035 T s^{-1}$$

The current induced in the loop if its resistance is $$2.00 \Omega$$ is 

A rod lies across frictionless rails in a uniform magnetic field $$\overrightarrow {B}$$ as shown in fig. The rod moves to the right with speed V. In order to make the induced emf in the circuit to be zero, the magnitude of the magnetic field should

A square coil ACDE with its plane vertical is released from rest in a horizontal uniform magnetic field $$\overrightarrow { B } $$ of length 2 L The acceleration of the coil 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

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

In the figure, shown the magnetic induction at the center of their arc due to the current in the potion $$AB$$ the magnetic induction at $$O$$ due to the whole length of the conductor is  

In the figure shown, the magnetic induction at the center of their arc due to the current in the potion $$AB$$ will be