72.

73.

74.

75.

76.

77.

78.

79.

Which among the following transitions is responsible for one of the lines in the sodium
doublet in a sodium vapour lamp ?

(७) 3ಉ್ಮಿಎತಿ್ಳೃ (8) ತೃ > 3855

൭ 3,238, (0) മാടം

Identify the correct equation for allowed values of the rotational energy of a diatomic

molecule:
2 2

(A) = ரர (B) ‏:سرت‎
‎(2 2
(©) [യം (0) ए (+)

A particle of rest mass my is moving uniformly along a straight line with relativistic

velocity kc, where c is the velocity of light in vacuum and 0 > k < 1. The phase velocity
of de Broglie waves associated with the particle is

(A) a (8) ति
(C) ൦ (D) ke

A photon of wavelength 7. is incident on a free electron at rest and is scattered in the
backward direction. The fractional shift in its wavelength in terms of the Compton
wavelength ‏م۸‎ of the electron is

he 3௦
^ 2 0 ‏کے‎

Ihe 2१८
(0) ‏کے‎ 0) -

The activity of a radioactive sample is decreased to one-third of the initial value in 100
days. The half-life of the sample is approximately

(A) 50 days (B) 63 days

(C) 30 days (D) 100 days

Two spherical nuclei with radii र] and R, have mass numbers 216 and 27 respectively.

Then Rig given by
R,

(A) 1.5 (8) 8
(೮) 12 (2) 2
A microcontroller is an example of
(4) VLSI (B) ADC
(C) MSI (D) EMI
The control unit of a microprocessor
(A) _ reads data from the data bus. (B) 101 the ALU what to do.
€) . controls the rate of the clock. ൭൩ writes addresses on the address bus.

019/2021 12. A