Magnetism and M...

In a given figure an isosceles triangle conducting wire is entering into the region of perpendicular uniform magnetic field $$B_0$$ with constant velocity $$V_0$$. The magnitude of induced emf as a function of time(t) in the wire is(till side is outside the field)

A conducting ring of radius $$1$$ metre is placed in a uniform magnetic field $$B$$ of $$0.01$$ tesla oscillating with frequency $$100Hz$$ with its plane at right angle to $$B$$. What will be the maximum induced electric field?

Three magnets of the same length but moments M, $$2$$M and $$3$$M are arranged in the forms of an equilateral triangle with opposite pole nearer, the resultant magnetic moment of the arrangement is?

A thin conducting rod of length $$l$$ is moved such that its end $$B$$ moves along the X-axis while end $$A$$ moves along the Y-axis. A uniform magnetic field $$B = {B_0}\hat k$$ exists in the region. At some instant, the velocity of end $$B$$ is $$v$$ and the rod makes an angle of $$\theta = 60$$ with the X-axis as shown in the figure. Then, at this instant 

At a place earth's magnetic field, $$5\times 10^{-5}\,Wb/m^2$$ is acting perpendicular to a coil of radius R=5 cm. If $$\dfrac{\mu_0}{4\pi}=10^{-7}$$, then how much current is induced in circular loop? 

A coil having $$n$$ turns and resistance $$4R$$ $$ \Omega$$. This combination is moved in time $$t$$ seconds from a magnetic field $$W_1$$ weber to $$W_2$$  weber. The induced current in the circuit is : 

A ferromagnetic material is placed in an external magnetic field. The magnetic domains 

Two concentric circular loops of radii $$R$$ and $$2R$$ carry currents of $$2i$$ and $$i$$ respectively in opposite sense (ie. Clockwise in one coil and center clockwise in the other oil). The resultant magnetic field at their common center is

A electron moves in a circular orbit at a distance from a proton with kinetic energy E. to escape to infinity, the energy which must be supplied to the electron is:

A bar magnet freely suspended in a vibration magnetometer has time period T at a place A and T/2 at a place B. If horizontal component of earth's magnetic field at A is $$36 \times 10^{-6}$$  T, then its value at 'B' is