Thursday, April 30, 2015

A metal ball of mass 2 kg moving with a speed of 36 km/hr has a head-on collision with a stationary ball of mass 3 kg. If after collision, both the balls move together, then loss in kinetic energy due to collision is
A)40 J
B)60 J
C)100 J
D)140 J

Monday, April 27, 2015

One mole of an ideal gas undergoes an isothermal change at temperature 'T' so that its volume v is doubled. T is the molar gas constant. Work done by the gas during this change is
A)RT log 4
B)RT log 2
C)RT log 1
D)RT log 3

Wednesday, April 22, 2015

Two particles P and Q start from origin and execute Simple Harmonic Motion along X - axis with same amplitude but with periods 3 seconds and 6 seconds respectively. The ratio of the velocities of P and Q when they meet is
A)1 : 2
B)2 : 1
C)2 : 3
D)3 : 2

Tuesday, April 21, 2015

If a straight line perpendicular to 2x - 3y + 7 = 0 forms a triangle with the coordinate axes whose area is 3 sq. units, then the equation of the straight line(s) is
A)3x + 2y = ± 7
B)3x + 2y = ± 6
C)3x + 2y = ± 8
D)3x + 2y = ± 4

Monday, April 20, 2015

A ray of light is incident on the surface of a slab of refractive index 1.5 and of thickness 't' so that the ray of light has angle of refraction 600, then the time taken to cross the slab will be
A)3t/c
B)3t/2c
c)2t/3c
D)4t/3c

Friday, April 17, 2015

A stretched wire of some length under a tension is vibrating with its fundamental frequency. Its length is decreased by 21%. Now its fundamental freequency :
A)increases by 50%
B)increases by 100%
C)decreases by 50%
D)decreases by 25%

Thursday, April 16, 2015

Circular disc of mass 2 kg and radius 1 metre is rotating about an axis perpendicular to its plane and passing through its centre of mass with a rotational kinetic energy of 8 Joules. The angular momentum in ( J-sec ) is    
A)8    
B)4    
C)2    
D)1
A ray of light is incident on the surface of a slab of refractive index 1.5 and of thickness 't' so that the ray of light has angle of refraction 600, then the time taken to cross the slab will be 
A)3t/c 
B)3t/2c 
2t/3c 
D)4t/3c

Tuesday, April 14, 2015

The maximum resultant of two concurrent forces is 10N and their minimum resultant is 4N. The magnitude of large force is    
A)5N    
B)7N    
C)3N    
D)14N

Monday, April 13, 2015

A boat which has a speed of 13 kmph in still water crosses a river of width 1 km along the shortest possible path in 12 minutes. The velocity of the river water in kmph is :
A)12
B)10
C)8
D)6

Saturday, April 11, 2015

A man travels 1 mile due east, than 5 miles due south, then 2 miles due east and finally 9 miles due north. His displacement is
A)3 miles
B)5 miles
C)4 miles
D)between 5 and 9 miles

Thursday, April 9, 2015

Which of the following is used as a moderator in nuclear reactors?
A)Heavy hydrogen
B)Ozone
C)Heavy water
D)Hydrogen peroxide

Wednesday, April 8, 2015

The number of 5 - digited numbers which are not divisible by 5 and which consist of different odd digits is
A)96
B)120
C)24
D)32

Monday, April 6, 2015

The man who is known as the Father of Experimental Physics is
A)Albert Einstein
B)Galileo
C) Rutherford
D)Newton

Friday, April 3, 2015

A vector points vertically upward and points towards south. Then the vector product is
A)along west
B)along east
C)along north
D)vertically down ward

Thursday, April 2, 2015

A nail is located at a certain distance vertically below the point of suspension of a simple pendulum of length 1m. The pendulum is released from the horizontal position. If it rotates in a vertical circle with nail as centre, the distiance of nail from point of suspension is
A)0.5 m
B)0.6 m
C)0.4 m
D)0.8m