Physics Questions and answers

Topics

  1. General Science
    1. Assertions and Reasons
    2. Biology
    3. Chemistry
    4. Physics
    5. Inventions
21). 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
22). For which one of the following is capillarity not the only reason ?
A). Blotting of ink
B). Rising of underground water
C). Spread of water drop on a cotton cloth
D). Rising of water from the roots of a plant to its foliage
23). 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
24). Which one of the following statements is correct ?
A slab of ice kept in a room :
A). doest not radiate heat
B). does not radiate heat but absorbs heat from the surrounding
C). radiates heat but absorbs more heat from the surrounding
D). radiates heat more than that absorbed by it from the surrounding
25). 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


26). Consider the following statements :
1. Horsepower is a bigger unit of power than kilowatt
2. One thousand crore is equal to \( \large 10^{10} \)
3. One acre is slightly greater than 5000 square metres
Which of the statements given above is/are correct ?
A). 1 and 2
B). 2 only
C). 1 and 3
D). 2 and 3
27). Match the following :
A. Movement of water and 1. Bernoulli's
water and minerals from Principle
from earth to leaves
of plants through roots
B. Lift of an aeroplane 2. Capillary action
during its flight
C. Formation of a star in the 3. Surface tension
universe
D. Cleaning action of soap 4. Gravitational force
Below options are given in A B C D order
A). 2 1 4 3
B). 2 4 3 1
C). 3 1 2 4
D). 3 4 2 1
28). Barium in a suitable form is administered t patients before and X-ray examination of the stomach, because :
A). barium allows X-rays to pass through the stomach on account of its
transparency to X-rays
B). barium compound, like magnesium sulphate helps in cleaning the stomach
before X-ray examination
C). barium is a good absorber of X-rays and this helps the stomach to appear
clearly in contrast with the other regions in the picture
D). barium salts are site in colour and this helps the stomach to appear clearly
in contrast with other regions in the picture
29). Consider the following statements regarding a motor car battery:
1. The voltage is usually 12V
2. Electrolyte used is hydrochloric acid
3. Electrodes are lead and copper
4. Capacity is expressed in ampere-hour
Which of the above statements are correct?
A). 1 and 2
B). 2 and 3
C). 3 and 4
D). 1 and 4
30). Consider the following statements:
The fog during winter season is more on the day when
1. sky is clear
2. sky is cloudy
3. wing is blowing
Which of the statements given above is/are correct?
A). 1 only
B). 1 and 3
C). 2 and 3
D). 2 only
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