A wire cuts across a flux of `0.2x10^(-2)` weber in 0.12 second. Calculate the emf induced.

The magnetic flux through a coil of 50 turns changes from 0.3wb per turn to zero in 1sec. Calculate the emf induced across the two ends of the coils.

For a reaction 2A rarr 4B+C , the concentration of B is increased by 5.0xx10^(-3) molL^(-1) in 10 seconds. Calculate the rate of disappearance of A.

In a reaction 2A rarr P the Conc of A decreases from 0.5molL^(-1) to 0.4molL^(-1) in 10 sec. Calculate the rate of the reaction.

The length of a sonometer wire is 0.75m and density 9xx10^3 kgm^(-3) . It can bear astress of 8.1xx10^8 Nm^(-2) without exceeding the elastic limit Calculate the fundamental frequency that can be produced in the wire.

An inductor 20 mH, a capacitor 50 μF and a resistor 40 Ω are connected in series across a source of emf V=10sin340t. Calculate the power loss in A.C. circuit

The magnetic flux through a coil perpendicular to its plane and directed into paper varying according to the relation phi= (5t^2+10t+5) mWb. Calculate the emf induced at t= 5 sec.

In a coil an emf 10V is induced when the current changes at the rate of 20 AS^(-1) Calculate the self-inductance of the coil.

A 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev/s at the bottom of the circle. The cross-sectional area of the wire is 0.065 cm^2 . Calculate the elongation of the wire when the mass is at the lowest point of its path.