Superposition of Waves — Physics STD 12 Science — Question

How do you calculate the shunt required to increase the length small n times?

An aircraft of a wing span of \(50 m\) flies horizontally in earth's magnetic field of \(6 \times 10^{-5} T\). Calculate the velocity required to generate an e.m.f. of \(1.2 V\) between the tips of the wings of the aircraft.

Explain Rayleigh's criterion for the resolution of two close point objects, when their images are:
(i) just resolved (ii) well resolved and (iii) unresolved

In U. C. M. (Uniform Circular Motion), prove the relation \(\vec{v}=\vec{\omega} \times \vec{r}\), where symbols have their usual meanings.

A simple pendulum of length \(1 m\) and mass \(10 g\) oscillates freely with amplitude \(2 cm\). Find its potential energy (P.E) at the extreme position. \(\left(g-9.8 m / s ^2\right)\)

A coil of 100 turns, each of area \(0.02 m ^2\) is kept in a uniform field of induction \(3.5 \times 10^{-5} T\). If the coil rotates with a speed of 6000 r.p.m. about an axis in the plane of the coil and perpendicular to the magnetic induction, calculate peak value of e.m.f. induced in the coil.

An unknown resistance is placed in the left gap and resistance of \(50 ohm\) is placed in the right gap of a meter bridge. The null point is obtained at \(40 cm\) from the left end. Determine the unknown resistance.

State formula and S.I. unit of Magnetization.

Explain the change in internal energy of a thermodynamic system (the gas) by heating it.