NUST QUESTION 2014 NET-2

NUST 

QUESTION 2014

NET-2

1.Diffraction effect is

a) more for a round edge
b) less for a round edge
c) more for a sharp edge
d) none of above

2.Which of the following have longest wavelength

a) X-Rays
b) Infared rays
c) Radio waves
d) none

3.Two satellites are moving in same circular orbit they must have same

a) mass
b) K.E
c) angular momentum,
d) speed

4.Two bodies having K.E in ratio 4:1 and masses in 1:4 have linear momentum in ratio

a) 1:1
b) 1:4
c) 3:2
d) none

5.An observer standing on a platform observes frequency of whistling train to be 2.2 kHz and 1.8kHz of the approaching and receding train. What is the speed of train

a) 30m/s
b) 20m/s
c) 10m/s
d) 60 m/s

6.By bombarding alpha particles on Helium, which will emit:

a) Boron
b) Carbon
c) Proton
d) none

7.Maxima in Young's experiment indicate:

a) a bright fringe
b) a dark fringe 
c) A constructive interference
d) both a and c

NET-1 Physics

8.A capacitor stores:

a) charge
b) current
c) both a and b
d) Voltage

NET-2 Physics

9.For a telescope:

a) fo>fe
b) fe<fo
c) fo=fe
d) none

10.In which process entropy remains constant

a) Adiabetic process
b) Isothermal process
c) Isobaric process
d) Isochloric process

11.The efficiency of Carnot Engine is maximum at:
a) 100 K
b) 0 K
c) 0 C 
d) none

12.Angle b/w rectangular co-ordinates of a vector 
a) 90
b) 180
c) They are mutually perpendicular
d) none

13.Gravity is maximum at ?

A) equator
B) poles
C) surface
D) none

14.ll of the following are units of energy except ? 

A) Erg
B) Kilowatt
C) Joule
D) Kilowatt hour

15.Two masses of 1 kg and 4 kg are moving with equal K.E . The ratio of their momentum are ?

A) 1:4
B) 4:1
C) 1:2
D) 2:1

16.A young's double slit set up for interference is shifted from water to air than fridgewidth 

A) increases
B) decreases
C) remains same
D) disappears

17.Percentage uncertainity in raidus 'r' is 2% . The percentage uncertainity in volume of sphere is ?

A) 4%
B) 6%
C) 8%
D) 9%

18.In interference pattern , Energy is ?

A) Created at the position of Maximum
B) Destroyed at the position of Minimum
C) Conserved but is redistributed
D) None

19.If R/Cp for a gas is 2/7 , the gas could be ?

A) Polyatomic
B) Heteroatomic
C) Diatomic
D) Monoatomic

20.In Elastic Collision

a) K.E is conserved
b) Momentum is conserved
c) Both K.E and P are conserved
d) none of these

21.Which waves don't carry energy

a) Mechanical waves
b) Sound waves
c) Light waves
d) Standing waves

22.Child paradox is an example of? 

A)time dilation 
b)mass variation 
c)comton effect 
d)length contraction