Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

Why does a metallic piece become very hot when it is surrounded by a coil carrying high frequency alternating current?

What is a Gaussian surface?

Write dimensional formula and unit of magnetic permeability of vacuum.

Which has larger susceptibility: Iron or copper?

Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better.
In which model is it completely wrong to ignore multiple scattering for the calculation of average angle of scattering of α-particles by a thin foil?

Two blocks of masses 10kg and 20kg moving at speeds of 10ms^-1 and 20ms^-1 respectively in opposite directions, approach each other and collide. If the collision is completely inelastic, find the thermal energy developed in the process.

When electrons drift in a metal from lower to higher potential, does it mean that all the free electrons of the metal are moving in the same direction?

Whose wavelength is minimum among the following:Micro waves, Ultraviolet radiation and X-rays.

Show variation of resistivity of Si with temperature in a graph.