Electromagnetic Waves — Physics STD 12 Science — Question

1 amu (u) is equivalent to :

Specific resistance of a semiconductor on increasing temperature :

Thermal neutrons are those which(a) Are at very high temperature(b) Move with high velocities(c) Have kinetic energies similar to those of surrounding molecules (d) Are at rest

The electric potential (V) inside a uniformly charged. spherical shell depends on distance:

Assertion   :   Photoelectric effect demonstrates the wave nature of light.
Reason       : The number of photoelectrons is proportional to the frequency of light.(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.

In which type of molecule positive and negative charges does not coincide with each other?

In an atom, electrons revolve around the nucleus. This gives rise to:

Which of the following is quantised according to Bohr’s theory of hydrogen atom(a) Linear momentum of electron(b) Angular momentum of electron(c) Linear velocity of electron(d) Angular velocity of electron