Electromagnetic...

A rod of length $$l$$ rotates with a uniform angular velocity $$\omega$$ rad/s about an axis passing through its middle point but normal to its length in a uniform magnetic field of induction $$B$$ with its direction parallel to the axis of rotation. The induced emf between the two ends of the rod is :

The total charge induced in a conduction loop when it is moved in magnetic field depends on

A proton of mass 'm' moving with a speed v ($$< <$$c, velocity of light in vacuum) completes a circular orbit in time 'T' in a uniform magnetic field. If the speed of the proton is increased to $$\sqrt{2}$$v, what will be time needed to complete the circular orbit?

A jet plane is travelling towards west at a speed of $$1800\ km/h$$. What is the voltage difference developed between the ends of the wing having a span of $$25\ m$$, if the Earth's magnetic field at the location has a magnitude of $$5 \times {10}^{-4}\ T$$ and the dip angle is $$30^o$$.

There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then

Consider the situation shown in figure. The wire AB slides 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

A circular copper disc 10 cm in diameter rotates at 1800 revolution per minute about an axis through its centre and at right angles to disc. A uniform field of induction B of 1 Wb $$m^2$$ is perpendicular to disc. What potential difference is developed between the axis of the disc and the rim ?

The mutual inductance $$M_{12}$$ of a coil 1 with respect to coil 2

Two circular coils can be arranged in any of three situations as shown in the figure. Their mutual inductance will be:

Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in: