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JSTSE PREVIOUS YEAR QUESTION PAPER 2006-07

JSTSE PREVIOUS YEAR QUESTION PAPER 2006-07

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Ques No 1:

A bullet fired vertically upwards reaches a height of 50 m and then falls back of the same place its displacement is

Options:

A. 100 m

B. 50 m

C. 75 m

D. Zero 

Ques No 2:

Two spheres of the same diameter but of different materials have message of 30 kg and 20 kg. They are dropped from the same height simultaneously. At a distance of 5 m from the ground, they will have the same

Options:

A. Acceleration

B. Momentum

C. Kinetic energy

D. Potential energy

Ques No 3:

A body moving in a circle with a constant speed will have

Options:

A. Constant velocity

B. Constant acceleration

C. Constant retardation

D. Variable acceleration

Ques No 4:

The momentum of a body is numerically equal to its kinetic energy. What is its speed

Options:

A. 1 m/s

B. 2 m/s

C. 3 m/s

D. 4 m/s

Ques No 5:

Which of the following gives the distance traveled by a body

Options:

A. Slope of distance-time curve

B. Area under distance time curve

C. Slope of speed-time curve

D. Area under speed-time curve

Ques No 6:

A scissor with one blade broken cannot cut a piece of paper. It can be explained of

Options:

A. Newton’s first law of motion

B. Newton’s second law of motion

C. Newton’s third law of motion

D. Laws of Friction

Ques No 7:

If the length of a seconds pendulum at two planets are in the ration of 2 : 3, the acceleration due to gravity in these planets will be in the ratio

Options:

A. 2 : 3

B. 3 : 2

C. Root2 : Root3

D. Root3 : Root2

Ques No 8:

A ball is allowed to tall freely from the root of a tower simultaneously another ball of the same mass. It projected horizontally from the same point with a speed of 2 ms -1. If the time taken by the first ball to strike the ground is 2 sec, , that taken by the another will be

Options:

A. 1 s

B. 1/2 s

C. 2 s

D. 3 s

Ques No 9:

The weight of an object in air is 720 N. Its weight when completely immersed in liquid of densities D1, D2 and D3, is 650 N, 550 N and 600 N respectively. Then which of the following is correct?

Options:

A. D2 > D3 > D1

B. D1 > D2 > D3

C. D3 > D2 > D1

D. D2 > D1 > D3

Ques No 10:

Which of the following can NOT be explained on Archimedes’ Principle

Options:

A. An iron ship floats on water while a small iron nails does not

B. Small insects can walk on the surface of water

C. An egg sink in pure water but floats in the salt solution

D. Ice floats on water

Ques No 11:

If a straight bimetallic strip made of iron and copper is heated, then

Options:

A. The strip will remain straight but will become longer

B. The strip will bend with copper on the convex slide

C. The strip will bend with iron on the convex side

D. The iron part of the strip will remain straight and copper part will bend

Ques No 12:

A circular plate, a solid cube and a solid sphere of the same metal have the same mass and are equally polished. All of them are heated to about 250*C and then left to cool. Which will cool slowest to the room temperature

Options:

A. The circular plate

B. The Sphere

C. The cube

D. All will cool at the same rate

Ques No 13:

In a certain thermometer the ice point is marked 40 degree C and the same point 240 degree C. What will be its reading corresponding to 50 degree C

Options:

A. 170 degree

B. 100 degree

C. 120 degree

D. 140 degree

Ques No 14:

Two bodies A and B at 150*C and 50*C respectively are enclosed in an evacuated insulated container. Then after some time the temperature of A will

Options:

A. Decrease because of loss of heat by radiation

B. Increase because of gain of heat by radiation

C. Increase because of heat gain by convection

D. Decrease because of heat loss by convection

Ques No 15:

50g of water and 50g of mercury are given the same amount of heat, then the rise in temperature

Options:

A. Of water will be more than that of mercury

B. Of mercury will be more than that of water

C. Of both will be same

D. Of both will depend upon their initial temperatures

Ques No 16:

If two liquids of different masses m1 and m2 and at temperatures t1 and t2 respectively, are mixed together, the final temperature of the mixture will

Options:

A. Be equal to (t1 + t2)/2

B. Be equal to (t1 + t2)

C. Be equal to (t1 + t2) or (t2 – t1)

D. Depend upon the specific heat capacities of the two liquids

Ques No 17:

Which will melt the maximum quantity of ice

Options:

A. 1 g of water at 100 degree C

B. 1 g of air at 100 degree C

C. 1 g of steam at 100 degree C

D. None. All will melt the same quantity of ice

Ques No 18:

If ‘u’ is the distance of an object placed in front of a concave mirror of local length ‘f’, then the image of the object will be erect and magnified (or enlarged) if

Options:

A. u < f

B. u > f

C. u = f

D. u = 2f

Ques No 19:

If u is the object distance and f the local length of a convex lens, then to obtain a real and diminished image, we should have

Options:

A. u < f

B. u > f

C. u = f

D. u = 2f

Ques No 20:

The image of an object formed by a mirror is always virtual and diminished irrespective of the position of the object infront of it. The mirror must be

Options:

A. Convex

B. Concave

C. Plane

D. Either plane of convex

Ques No 21:

The focal length of a concave lens is ‘f’ cm. If an object is placed at a distance of ‘2f’ form it, the image formed will be

Options:

A. Real and equal in size to the object

B. Virtual and equal in size to the object

C. Real and diminished

D. Virtual and diminished

Ques No 22:

If the image of a circle is to be formed on the wall of a room, we will have to use a

Options:

A. Plane mirror

B. Concave lens

C. Convex mirror

D. Concave mirror of a convex lens

Ques No 23:

An object is placed in front of a plane mirror such that the distance between the object and its image is 20 cm. If the object is moved 5 cm further away from the mirror the distance between the object and the image will become

Options:

A. 10 cm

B. 20 cm

C. 30 cm

D. 40 cm

Ques No 24:

A ray of light passes from glass to water. If the angle of incidence is 30*, the angle of refraction in water will be

Options:

A. 30 degree

B. Less Than 30 degree

C. More Than 30 degree

D. 90 degree

Ques No 25:

Which of the following sounds are audible to human ear? Sounds of frequency

Options:

A. 2500 Hz

B. 25000 Hz

C. 10 Hz

D. 35000 Hz

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