Electromagnetic...

The magnetic flux linked with a coil varies as $$\phi =3t^2+4t+9$$. The magnitude of the emf induced at $$t=2$$ seconds is?

The current carrying wire and the rod AB are in same plane. The rod moves parallel to the wire with a velocity v. Which on of the following statement is true about induced emf in the rod?

Two coils have a mutual inductance of $$0.01H$$. The current in the first coil changes according to equation $$I=5\sin 200\pi t$$. The maximum value of e.m.f. induced in the second coil is?

A non-conducting ring of radius $$r$$ has charge per unit length $$\lambda$$. A magnetic field perpendicular to plane of the ring changes at rate $$dB/dt$$. Torque experienced by the ring is :

Consider the following statements:
(A) an emf can be induced by moving a conductor in a magnetic field
(B) An emf can be induced by changing the magnetic field

A conducting square loop of side $$l$$ and resistance $$R$$ moves in its plane with a uniform velocity $$v$$ perpendicular to one of its sides. A uniform and constant magnetic field $$B$$ exists along the perpendicular to the plane of the loop as shown in figure. The current induced in the loop is

A small circular loop of radius $$r$$ is placed inside a circular loop of radius $$R(R>>r)$$. The loops are coplanar and their centres coincide. The mutual inductance of the system is proportional to :

Consider the situation shown in figure. The wire $$AB$$ is slid on the fixed rails with a constant velocity. If the wire $$AB$$ is replaced by a semicircular wire, the magnitude of the induced current will

The inductance of a coil in which a current of $$0.1\ A$$ increasing at the rate of $$0.5\ A/s$$ represents a power flow of $$\dfrac{1}{2}\ watt$$, is :

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