Electromagnetic...

A hundred turns of insulated copper wire are wrapped around an iron cylinder of area 1 × 10^–3 m¹ and areconnected to a resistor. The total resistance in the circuit is 10 ohms. If the longitudinal magnetic induction in the iron changes from 1 weber m^–2, in one direction to 1 weber m^–2 in the opposite direction, how much charge flows through the circuit

An aircraft with a wing-span of 40 m flies with a speed of 1080 km h^–1 in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of earth\'s magnetic field is 1.75 × 10^–5T.Then the e.m.f. that develops between the tips of the wings is

In which of the following circuit is the current maximum just after the switch S is closed

A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is n and the cross-sectional area of the coil is A. When the coil turns through 180° about its diameter, the charge flowing through the coil is Q. The total resistance of the circuit is R. What is the magnitude of the magnetic induction

Two circular coils A and B are facing each other as shown in figure. When the current i through A is altered

A conducting loop having a capacitor is moving outward from the magnetic field then which plate of the capacitor will be positive

A straight wire of length L is bent into a semicircle. It is moved in a uniform magnetic field with speed v with diameter perpendicular to the field. The induced e.m.f.between the ends of the wire is