53.

54.

88.

56.

57.

68.

89.

The spherical aberration of the lens can be minimised :
(ಗಿ) by using a crossed ‏قمعا‎
‎(18) by using two lenses separated by a distance
(C) by using a planable lens
(D) all of these

A bullet വ്‌ mass 0.04 kg moving with a speed of 90 m/s enters a heavy wooden block and
stopped after distance of 60 cm. The retardation of the bullet is :

(^) -6750 ‏ثولم‎ (B) -6570 7/8:
(८) -7650 १/8 . (D) -6705 १8४

The percentage in the measurement of mass and velocity 35 1% and 2% respectively. Then the
percentage error in kinetic energy is :

)۸ 4% (B) 5%

© 6% D) 8%

The measured value of a quantity is 76.5 and the expected value is 80.0. Then the relative
erroris

(^) 0.05% 18) -5.6%

(८) -8.5% D) 6.5%

Which property of zener diode is used to regulate supply voltage?
(ಯ) At break down voltage there is a large in the reverse current
(B) The large reverse current will change the reverse voltage
(0) The zener voltage is independent of the current through the diode
(D) None of these

The density വ്‌ atmosphere at sea level is 1.29 kg/m® Assume that it does not change with
altitude, the atmosphere extended up to :

കു ടി (छ) 95km
(©) 125km D) 18km

The least count of screw gauge is given by :
(ಗೆ) pitch/ number of division on main scale
(18) magnitude of one main scale division / number of division on vernier scale
(C) pitch / number of division on head scale
(D) magnitude of one pitch scale division / number of division on vernier scale

In Newton’s ring experiment the diameter of m® ring changes from 1.2 em to 1 cm when the
air space between the lens and the plate is replaced by some transparent liquid. The
refractive index of the liquid is :

(4) 1.45 (B) 144
(©) 1.88 D) 5

9 074/2016
[P.T.0.]