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 481: A quantity of gas occupies a certain volume when the temperature is -73oC and the pressure is 1.5 atmospheres. If the pressure is increased to 4.5 atmospheres and the volume is halved at the same time, what will be the new temperature of the gas?
Options:
A) 573oC
B) 327oC
C) 300oC
D) 110oC
E) 27oC
Show Answer
The correct answer is E .
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Question 482:
The diagram above show s the force-extension curve of a piece of wire. The energy stored when the wire is stretched from E to F is
Options:
A) 7.5 x 10-3J
B) 2.5 x 10-3J
C) 1.5 x 10-2J
D) 7.5 x 10-1J
Show Answer
The correct answer is A .
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Question 483: When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as
Options:
A) beats
B) echoing
C) resonance
D) reverberation
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The correct answer is C .
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Question 484: When a number of identical small magnets are arranged in a line, the strength of the resultant magnet
Options:
A) ia largest when they are arranged end to end
B) is greatest when they are arrangedparallel with like poles adjacent to each other
C) depends only on the number of magnets provided they arev parallel
D) is greater when the magnets are arranged on a wooden surface than on a metaln surface
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The correct answer is A .
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Question 485: Body floats in fluid when its …………………
Options:
A) Displaces its own volume of the liquid (fluid)
B) Displaces its own mass of the fluid
C) Displace its own density of the fluid
D) Is no longer subjected to gravity
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The correct answer is B .
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Question 486: Which of the following can be used to reduce local action in a Laclanche cell?
Options:
A) A carbon rod as the positive pole
B) Pure zinc as the negative pole
C) Potassium permanganate solution in contact with the positive pole
D) common salt solution
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The correct answer is C .
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Question 487: Which of the following radiations cannot be deflected by a magnetic field?
Options:
A)
B)
C)
D) and
E) none of them
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The correct answer is C .
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Question 488:
In the Figure above, QR is a vertical conductor and the current I flows from R to Q, P is a point on the horizontal plane and is to the south of the wire. The direction of the magnetic field at P due to the current is
Options:
A) Upward
B) North
C) South
D) West
E) East
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The correct answer is D .
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Question 489:
In fig 9 the value of R is
Options:
A) 3Ω
B) 4Ω
C) 5Ω
D) 6Ω
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The correct answer is D .
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Question 490:
Which of the following statements about radioactivity is true?
(i) Alpha particle is positively charged
(ii)Beta particle is negativelycharged
(iii) Gamma ray is neutral
(iv) Beta particle has thesame massas helium atom
(v) Gamma ray is charged.
Options:
A) i, ii, iii, iv only
B) i, ii, iii only
C) iv and v only
D) i, ii and v only
Show Answer
The correct answer is B .