Hello, here I am providing you the questions of the KCET exam as under:

In a Young’s double slit experiment the slit separation is 0.5 m from the slits. for a monochromatic light of wavelength 500 nm, the distance of 3rd maxima from 2nd minima on the other side is

(1) 2.5 mm
(2) 2.25mm
(3) 2.75mm
(4) 22.5 mm

Ans: (Bonus)

Note: Data Insufficient

Calculate the focal length of a reading glass of a person if his distance of distinct vision is 75 cm.

(1) 37.5 cm
(2) 100.4 cm
(3) 25.6 cm
(4) 75.2 cm

Ans: (1)

A person wants a real image of his own, 3 times enlarged. Where should he stand infront of a concave mirror of radius of curvature 30 cm?

(1) 30 cm
(2) 20 cm
(3) 10 cm
(4) 90 cm

Ans: (1)

The polarizing angle of glass is 57°. A ray of light which is incident at this angle will have an angle of refraction as

(1) 33°
(2) 38°
(3) 25°
(4) 43°

Ans: (1)

A radioactive decay can form an isotope of the original nucleus with the emission of particles

(1) one D and two E
(2) four D and onceE
(3) one D and four E
(4) one D and one E

Ans: (1)

The half life of a radioactive substance is 20 minutes. The time taken between 50% decay and 87.5% decay of the substance will be

(1) 40 minutes
(2) 10 minutes
(3) 30 minutes
(4) 25 minutes

Ans: (1)

A nucleus at rest splits into two nuclear parts having radii in the ratio 1 : 2 Their velocities are in the ratio

(1) 6 : 1
(2) 2 : 1
(3) 8 : 1
(4) 4 : 1

Ans: (3)

What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (take hc = 1240 eV nm)

(1) 102 nm
(2) 150 nm
(3) 82 nm
(4) 122 nm

Ans: (4)

Amplitude modulation has
(1) one carrier
(2) one carrier with high frequency
(3) one carrier with two side band frequencies
(4) one carrier with infinite frequencies

Ans: (3)

The waves used for line-of-sight (LOS) communication is

(1) space waves
(2) sky waves
(3) ground waves
(4) sound waves

KCET Answer Keys