Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.
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Question 461:
A convex mirror is used as a driving mirror because
i. its image is erect.
ii. it has a large field of view.
iii. it has a long focal length.
Identify the CORRECT statement(s)
Options:
A) i andiii only
B) i and ii only
C) ii and iii only
D) i, ii, and iii only
E) i only
Show Answer
The correct answer is B .
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Question 462: In a compound microscope
Options:
A) there is only one lens
B) the objective lens have a shorter focal length than the eyepiece which is convex
C) the objective lens has a longer focal length than the eyepiece which is convex
D) the objective lens has a shorter focal length than the eyepiece which is concave
E) the objective and the eyepiece are both convex and have the same focal length
Show Answer
The correct answer is B .
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Question 463: Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?
Options:
A) the polished vessel will cool faster because a polished surface is a good radiator
B) the polished vessel will cool faster because it will absorbe less heat from the room
C) the black vessel will cool faster because it is a better conductor of heat
D) the polished vesselwill cool faster because it reflects heat better
E) the black vessel will cool faster because a black surface radiates heat faster than a polished one
Show Answer
The correct answer is D .
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Question 464:
From the diagram above, calculate the energy stored in the capacitor
Options:
A) 4.0 x 10J
B) 4.0 x 10J
C) 8.0 x 10J
D) 8.0 x 10J
Show Answer
The correct answer is B .
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Question 465: The force experienced by an object of mass 60.0kg in the moon's gravitational field is 1.002 x 102N. What is the intensity of the gravitational field?
Options:
A) 0.60Nkg-1
B) 1.67Nkg-1
C) 6.12 x 102Nkg-1
D) 9.81ms-2
Show Answer
The correct answer is B .
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Question 466: The lack of power of accommodation which is mainly due to the hardening of the eye lens and is usual with onset of old age is called?
Options:
A) myopia
B) hypermyopia
C) presbyopia
D) astigmatism
E) eye ring
Show Answer
The correct answer is C .
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Question 467:
In the molecular explanation of conduction, heat is transferred by the
Options:
A) Free electrons
B) Free atoms
C) Free molecules
D) Free solids
Show Answer
The correct answer is A .
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Question 468: The terminal velocity of a ball-bearing falling through a viscous fluid reached when the
Options:
A) upthrust is equal to the weight of the ball
B) ball accelerate uniformly
C) upthrustis equal to the velocity of the ball
D) velocity is uniform
Show Answer
The correct answer is D .
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Question 469: Shadows and eclipses result from the
Options:
A) refraction of light
B) rectilinear propagation of light
C) defraction of light
D) reflection of light
Show Answer
The correct answer is B .
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Question 470:
When the temperature of a liquid increases,its surface tension
Options:
A) decreases
B) increases
C) remains constant
D) increases then decreases
Show Answer
The correct answer is A .