Electrostatics — Physics STD 12 Science — Question

Maxwell’s equations describe the fundamental laws of(a) Electricity only(b) Magnetism only(c) Mechanics only(d) Both (a) and (b)

Out of the following, which colour's wavelength is more than the wavelength of yellow colour?

50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1mm thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of the aluminium foil that will allow 50% of the X-ray to pass through will be:

If we increase the driving frequency in a circuit with a purely resistive load, then amplitude VR​.

Nuclear fusion is common to the pair(a) Thermonuclear reactor, uranium based nuclear reactor(b) Energy production in sun, uranium based nuclear reactor(c) Energy production in sun, hydrogen bomb(d) Disintegration of heavy nuclei, hydrogen bomb

The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along:

A gas is contained in a metallic cylinder fitted with a piston. The piston is suddenly moved in to compress the gas and is maintained at this position. As time passes the pressure of the gas in the cylinder:

1. Increases.
2. Decreases.
3. Remains constant.
4. Increases or decreases depending on the nature of the gas.

The photocurrent in an experiment on photoelectric effect increases if:

1. The intensity of the source is increased.
2. The exposure time is increased.
3. The intensity of the source is decreased.
4. The exposure time is decreased.