1.
According to Einstein’s theory of relativity when a body moves with a velocity
comparable to the velocity of light, its
(a)
Mass and length decrease
(b)
Mass and length increase
(c)
Length increases but mass decreases
(d)
Length decreases but mass increases
2. A person stands at the middle point of
a wooden ladder which starts slipping between a vertical wall and the floor of
a room, while continuing to remain in a vertical
plane. The path traced by a person standing at the middle point of the slipping
ladder is
(a)
A straight line
(b)
a elliptical path
(c)
a circular path
(d)
a parabolic path
3. Consider the following statements
with reference to X- rays.
1.
They produce heat when absorbed by matter.
2.
They are generated when fast moving electrons
strike a metal target.
3.
They can penetrate through a thin sheet of
aluminium.
Which of the statements given above are
correct?
(a)
1, 2 and 3
(b)
1 and 2
(c)
2 and 3
(d)
1 and 3
4. When an electrical safety fuse is rated (marked) as 16 A, it means it
(a)
Will not work if current is less than 16 A
(b)
Has a resistance of 16 Ω
(c)
Will work if the temperature is more than 16˚C
(d)
Will be blown (break) if current exceeds 16 A
5.
A body lying at rest suddenly breaks into two parts of equal masses
which start moving . The two parts will move in
(a)
Opposite direction with equal speed
(b)
Same direction with equal speed
(c)
Any direction with unequal speed
(d)
Opposite direction with unequal speed
6. Consider the following statements.
1.
Horsepower is a bigger unit of power than kilowatt.
2.
One thousand crore is equal to 10 ¹⁰
3.
One acre is slightly greater than 5000m²
Which of the statements given above is/ are
correct?
(a)
1 and 2
(b)
2 only
(c)
1 and 3
(d)
2 and 3
7. A person
sitting in an open car moving at constant velocity throws a ball vertically
upwards in air, if effect of air resistance is neglected the ball will fall
(a)
Exactly in hands of the person
(b)
Outside the car
(c)
In the car behind the person
(d)
In the car ahead of the person
8. A swinging pendulum has its maximum
acceleration at
(a)
The bottom of the swing
(b)
The two extremities of the swing
(c)
Every point on the swing
(d)
No particular portion of the pendulum
9. Superconductivity results when matter is
(a)
heated to
very high temperature
(b)
Compressed to very high pressure
(c)
Subjected to very low pressure
(d)
Cooled to very low temperature
10. The
process of nuclear fusion in the sun requires
(a)
Very high temperature and very high pressure
(b)
Low temperature and high pressure
(c)
High temperature
and low pressure
(d)
Very high temperature and no pressure.
Answer:
1.
C
2.
C
3.
A
4.
D
5.
A
6.
D
7.
A
8.
B
9.
D
10.
D
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