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 351:
When a brick is taken from the earth's surface to the moon, its mass
Options:
A) Remains constant
B) Becomes zero
C) Reduces
D) increases
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The correct answer is A .
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Question 352: In photo-emission, the number of photo-electrons ejected per second depends on the
Options:
A) frequency of the beam
B) work function of the metal
C) threshold frequency of the metal
D) intensity of the beam
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The correct answer is C .
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Question 353: At what respective values of X, Y and Z would the unit of force, the newton, be dimensionally equivalent to MxLyTz?
Options:
A) -1, 1, 2
B) 1, 1, -2
C) 1, -1, 2
D) -1, 1, -2
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The correct answer is B .
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Question 354:
I. Its velocity is constant
II. No work is done on the body
III. It has constant acceleration directed away from the centre
IV. The centripetal force is directed towards the centreWhich combination of the above is true of a body moving with constant speed in a circular track?
Options:
A) II and IV
B) I and IV
C) II and III
D) I and III
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The correct answer is A .
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Question 355: If the capacitance of an capacitor is C = (εA)/d, which of the following parameters is varied when a variable capacitors is used for tuning radio sets?
Options:
A) constant (ε) and area
B) area and distance.
C) constant (ε) only
D) distance only
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The correct answer is B .
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Question 356: An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is
Options:
A) 0.75cm
B) 4.00cm
C) 8.00cm
D) 12.00cm
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The correct answer is D .
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Question 357: The angular dispersion of a prism depends on
Options:
A) the index of refraction only
B) the angle of incidence as well as the index of refraction
C) the angle of incidence only
D) the thickness of the prism
E) the prism angle
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The correct answer is A .
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Question 358:
In an AC circuit, resonance occurs when the impedance of the circuit is:
Options:
A) Zero
B) Maximum
C) Equal to the capacitive reactance of the circuit
D) Minimum
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The correct answer is D .
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Question 359: A 500kg car which was initially at rest travelled with an acceleration of 5m sec-2, its kinetic energy after 4 seconds was
Options:
A) 105J
B) 2.5 x 103J
C) 2 x 103J
D) 5 x 103J
E) 5 x 105J`
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The correct answer is A .
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Question 360:
The graph in the fig above describes the motion of a particle. the acceleration of the particle during the motion is
Options:
A) 0.00ms-2
B) 0.25ms-2
C) 4.00ms-2
D) 8.00ms-2
E) 10.00ms-2
Show Answer
The correct answer is C .