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 1: The operation of an optical fibre is based on the principal of
Options:
A) dispersion of light
B) interference of light
C) refraction of light
D) polarization of light
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The correct answer is C .
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Question 2: One of the features of the fission process is that
Options:
A) its products are not radioactive
B) it leads to chain reaction
C) neutrons are not released
D) the sum of the masses of the reactants equals the sum of masses of the products
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The correct answer is B .
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Question 3: The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is
Options:
A) 200Hz
B) 400Hz
C) 800Hz
D) 1600Hz
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The correct answer is B .
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Question 4: A wave that travels through stretched strings is known as
Options:
A) electromagnetic wave
B) micro wave
C) mechanical wave
D) seismic wave
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The correct answer is C .
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Question 5:
In the diagram above, what would happen to the current I, if another resistor, R2, is connected in parallel to R1?
Options:
A) It will increase because the equivalent resistance will increase
B) It will decrease if R2 is greater than R1
C) It will increase because the effective resistance will decrease
D) It will decrease if R2 is less than R1
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The correct answer is C .
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Question 6: 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 7: An object moves with uniform speed round a circle. Its acceleration has
Options:
A) constant magnitude and constant direction
B) constant magnitude and varying direction
C) varying magnitude but constant direction
D) varying magnitude and varying direction
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The correct answer is B .
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Question 8: An element and its isotope only differ in the number of
Options:
A) protons
B) electrons
C) ions
D) neutrons
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The correct answer is D .
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Question 9: A circuit has an area of 0.4m2 and consists of 50 loops of wire. If the loops are twisted and allowed to rotate at a constant angular velocity of 10 rad s-1 in a uniform magnetic field of 0.4T, the amplitude of the induced voltage is
Options:
A) 8V
B) 16V
C) 20V
D) 80V
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The correct answer is D .
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Question 10: Electrons were discovered by
Options:
A) James Chadwick B.
B) J.J Thompson
C) Sir Isaac Newton
D) Charles Newton
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The correct answer is B .