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

In non-resonant circuit, what will be the nature of the circuit for frequencies higher than the resonant frequency?

When an electromagnetic wave enters an ionised layer of earth’s atmosphere present in ionosphere:

The velocity of emitted electrons in photelectric effect depends :

The fine powder of a coloured glass is seen as(a) Coloured(b) White(c) That of the glass colour(d) Black

X-ray beam can be deflected:

1. By an electric field.
2. By a magnetic field.
3. By an electric field as well aa by a magnetic field.
4. Neither by an electric field nor by a magnetic field.

Assertion   :   Inductance coil are made of copper.
Reason       : Induced current is more in wire having less resistance.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.

Gauss’s law is true only if force due to a charge varies as:a

An object can be negatively charged by:

Demagnetisation of magnets can be done by(a) Rough handling(b) Heating(c) Magnetising in the opposite direction(d) All the above