Electric Charges and Fields — Physics STD 12 Science — Question

What is the necessary condition for diffraction of light?

Answer carefully:
What meaning would you give to the capacitance of a single conductor?

Name the electromagnetic waves which :
(a) are useful in removing tension in musceles.
(b) are absorbed by ozone layer in atmosphere.

What is the relationship between the electric field intensities due to a small electric dipole on its axis and abscissa?

Which out of the following are electromagnetic waves X-rays, sound waves and radio waves?

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?

What is spectrum?

A capacitor with stored energy 4.0J is connected with an identical capacitor with no electric field in between. Find the total energy stored in the two capacitors.

When a dielectric slab is gradually inserted between the plates of an isolated parallel-plate capacitor, the energy of the system decreases. What can you conclude about the force on the slab exerted by the electric field?

Answer the following question:
A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment?