GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 037
361). Alternating current instead of direct current is used m long distance electric transmission because
A). it is easy to generate
B). rectification is possible
C). energy losses are minimum
D). it causes fewer accidents
Answer: energy losses are minimum
362). In the human eye, the focusing is done by
A). to and fro movement of the eye lens
B). to and fro movement of the retina
C). change in the convexity of the eye lens
D). change in the refractive index of the eye fluids
Answer: change in the convexity of the eye lens
363). Consider the following statements with reference to X-rays
I. They produce heat when absorbed by matter
II. They are generated when fast-moving electrons strike a metal target
III. They can penetrate through a thin sheet of aluminium
Which of the statements given above are correct?
A). I, II and III
B). I and II
C). II and III
D). I and III
Answer: I and II
364). Consider the following statements
1. Horsepower is a bigger unit of power than kilowatt
II. One thousand crore is equal to 10^10
A). it is easy to generate
B). rectification is possible
C). energy losses are minimum
D). it causes fewer accidents
Answer: energy losses are minimum
362). In the human eye, the focusing is done by
A). to and fro movement of the eye lens
B). to and fro movement of the retina
C). change in the convexity of the eye lens
D). change in the refractive index of the eye fluids
Answer: change in the convexity of the eye lens
363). Consider the following statements with reference to X-rays
I. They produce heat when absorbed by matter
II. They are generated when fast-moving electrons strike a metal target
III. They can penetrate through a thin sheet of aluminium
Which of the statements given above are correct?
A). I, II and III
B). I and II
C). II and III
D). I and III
Answer: I and II
364). Consider the following statements
1. Horsepower is a bigger unit of power than kilowatt
II. One thousand crore is equal to 10^10
III. One acre is slightly greater than 5000 square meters
Which of the statements given above is/are correct?
A). I and II
B). II only
C). I and III
D). II and III
Answer: II only
365). Two plane mirrors A and B are placed at a distance 12 cm apart facing towards each other. An object is placed in between them at a distance 8 cm from the mirror A. What will be the distance between the first two images formed in the mirror B?
A). 4 cm
B). 8 cm
C). 16 cm
D). 20 cm
Answer: 16 cm
366). A wire is bent in the form of uniform circular ring. A and B are two points on the ring such that ∠AOB=60∘, where O is the centre of ring. If the equivalent resistance across A and B is 5 Ω what is the resistance of the whole wire?
A). 5 Ω
B). 6 Ω
C). 30 Ω
D). 36 Ω
Answer: 30 Ω
367). 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
Answer: opposite direction with equal speed
368). A massless rubber balloon has been inflated by filling it with 200 grams of water. How much will this balloon weigh, when it is completely immersed in water contained in a bucket? (Take g = 9.8ms^−2)
A). 3.92N
B). 1.96N
C). 0.98N
D). zero
Answer: zero
369). Which one of the following pairs of physical quantities has the same dimensions ?
A). Surface tension and tension p
B). Momentum heat and specific heat
C). Momentum and impulse
D). Acceleration due to gravity and gravitational constant
Answer: Momentum and impulse
370). In a garden, a boy is swinging in the standing position. How will the time period of the swing be affected if the boy sits down on the swing?
A). Time period will not change
B). Time period will increase
C). Time period will decrease
D). Time period will depend on the weight of the boy
Answer: Time period will increase
Which of the statements given above is/are correct?
A). I and II
B). II only
C). I and III
D). II and III
Answer: II only
365). Two plane mirrors A and B are placed at a distance 12 cm apart facing towards each other. An object is placed in between them at a distance 8 cm from the mirror A. What will be the distance between the first two images formed in the mirror B?
A). 4 cm
B). 8 cm
C). 16 cm
D). 20 cm
Answer: 16 cm
366). A wire is bent in the form of uniform circular ring. A and B are two points on the ring such that ∠AOB=60∘, where O is the centre of ring. If the equivalent resistance across A and B is 5 Ω what is the resistance of the whole wire?
A). 5 Ω
B). 6 Ω
C). 30 Ω
D). 36 Ω
Answer: 30 Ω
367). 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
Answer: opposite direction with equal speed
368). A massless rubber balloon has been inflated by filling it with 200 grams of water. How much will this balloon weigh, when it is completely immersed in water contained in a bucket? (Take g = 9.8ms^−2)
A). 3.92N
B). 1.96N
C). 0.98N
D). zero
Answer: zero
369). Which one of the following pairs of physical quantities has the same dimensions ?
A). Surface tension and tension p
B). Momentum heat and specific heat
C). Momentum and impulse
D). Acceleration due to gravity and gravitational constant
Answer: Momentum and impulse
370). In a garden, a boy is swinging in the standing position. How will the time period of the swing be affected if the boy sits down on the swing?
A). Time period will not change
B). Time period will increase
C). Time period will decrease
D). Time period will depend on the weight of the boy
Answer: Time period will increase
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