GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 041
401). How long does it take light from the sun to reach the earth (approximately)?
A). 2 minutes
B). 4 minutes
C). 8 minutes
D). 16 minutes
Answer: 8 minutes
402). Which of the following is not the characteristic of X-rays?
A). No medium is required for their propagation
B). They obey laws of reflection
C). They travel with the speed of light waves
D). They are longitudinal in nature
Answer: They are longitudinal in nature
403). Consider the following statements :
A body weighs less at the equator than at the poles because
I. the earth rotates about is axis.
II. the ice cap at the poles increases gravitational pull.
III. equatorial diameter is greater than the polar diameter.
IV. of some unknown facts. W
hich of the given statements is/are correct?
A). I and II
B). III only
C). I and III
D). IV only
Answer: I and III
404). Consider the following statements : Work is not done, when
I. a man is walking on a horizontal road.
II. a man is climbing up a hill.
III. a man with a load on his head is walking on a horizontal road.
IV. moon is revolving round the earth.
Which of the statements given above are correct?
A). I and III only
B). I and IV only
C). II, III and IV
D). I, III and IV
Answer: I, III and IV
405). How does time period(T) of a seconds pendulum vary with length(l)?
A). T∝√l
B). T∝l^2
C). T∝l
D). T does not depend on l
Answer: T does not depend on l
406). Lightning is formed, when
A). similar charges of electricity rush towards each other and then get repelled
B). clouds strike against impurities in air and the friction burns up these impurities
C). strong opposite charges in different clouds breakdown the resistance offered by intervening air
D). water vapour produces electricity in the clouds
Answer: strong opposite charges in different clouds breakdown the resistance offered by intervening air
407). When light waves travel from air to glass, which variables are affected?
A). Wavelength, frequency and velocity
B). Velocity and frequency only
C). Wavelength and frequency only
D). Wavelength and velocity only
Answer: Wavelength and velocity only
408). Electrical lines of force
A). exist everywhere
B). exist in the immediate vicinity of positive charge
C). exist in the immediate vicinity of positive charge
D). are imaginary
Answer: are imaginary
409). Which one of the following properties distinguishes ultrasound from normal audible sound?
A). Intensity
B). Speed of propagation
C). Frequency
D). Quality
Answer: Frequency
410). Large aperture telescopes are used for
A). greater resolution
B). greater magnification
C). reducing lens aberration
D). ease of manufacture
Answer: greater resolution
A). 2 minutes
B). 4 minutes
C). 8 minutes
D). 16 minutes
Answer: 8 minutes
402). Which of the following is not the characteristic of X-rays?
A). No medium is required for their propagation
B). They obey laws of reflection
C). They travel with the speed of light waves
D). They are longitudinal in nature
Answer: They are longitudinal in nature
403). Consider the following statements :
A body weighs less at the equator than at the poles because
I. the earth rotates about is axis.
II. the ice cap at the poles increases gravitational pull.
III. equatorial diameter is greater than the polar diameter.
IV. of some unknown facts. W
hich of the given statements is/are correct?
A). I and II
B). III only
C). I and III
D). IV only
Answer: I and III
404). Consider the following statements : Work is not done, when
I. a man is walking on a horizontal road.
II. a man is climbing up a hill.
III. a man with a load on his head is walking on a horizontal road.
IV. moon is revolving round the earth.
Which of the statements given above are correct?
A). I and III only
B). I and IV only
C). II, III and IV
D). I, III and IV
Answer: I, III and IV
405). How does time period(T) of a seconds pendulum vary with length(l)?
A). T∝√l
B). T∝l^2
C). T∝l
D). T does not depend on l
Answer: T does not depend on l
406). Lightning is formed, when
A). similar charges of electricity rush towards each other and then get repelled
B). clouds strike against impurities in air and the friction burns up these impurities
C). strong opposite charges in different clouds breakdown the resistance offered by intervening air
D). water vapour produces electricity in the clouds
Answer: strong opposite charges in different clouds breakdown the resistance offered by intervening air
407). When light waves travel from air to glass, which variables are affected?
A). Wavelength, frequency and velocity
B). Velocity and frequency only
C). Wavelength and frequency only
D). Wavelength and velocity only
Answer: Wavelength and velocity only
408). Electrical lines of force
A). exist everywhere
B). exist in the immediate vicinity of positive charge
C). exist in the immediate vicinity of positive charge
D). are imaginary
Answer: are imaginary
409). Which one of the following properties distinguishes ultrasound from normal audible sound?
A). Intensity
B). Speed of propagation
C). Frequency
D). Quality
Answer: Frequency
410). Large aperture telescopes are used for
A). greater resolution
B). greater magnification
C). reducing lens aberration
D). ease of manufacture
Answer: greater resolution
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