Physics Exam Past Questions and Answers | JAMB, WAEC and NECO
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 111: Find the work done in moving a 2 C charge between two points X and Y in an electric field if the potential difference is 100 volts
Options:
A) 50J
B) 100J
C) 200J
D) 400J
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The correct answer is C .
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Question 112: If the uncertainty in the measurement of the position of a particle is 5.0 x 10-10m, the uncertainty in the momentum of the particle is
Options:
A) 1.32 x 10-44Ns
B) 3.30 x 10-44Ns
C) 1.32 x 10-24Ns
D) 3.30 x 10-24Ns
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The correct answer is C .
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Question 113: A thermometer with an arbitrary scale S, of equal division registers -30oS at the ice point and +90oS at the steam point. Calculate the Celsius temperature corresponding to 60oS
Options:
A) 25.0oC
B) 50.0oC
C) 66.7oC
D) 75.0oC
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The correct answer is D .
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Question 114: Lenz's law is a law of conservation of
Options:
A) electric charge
B) electric current
C) Energy
D) Momentum
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The correct answer is C .
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Question 115: If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material?
Options:
A) 24 years
B) 20 years
C) 10 years
D) 2 years
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The correct answer is B .
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Question 116: A sonometer wire of length 100cm under a tension of 10N, has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is
Options:
A) 5.1N
B) 7.1N
C) 14.0N
D) 19.6N
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The correct answer is D .
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Question 117: A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is
Options:
A) 0.2N
B) 0.8N
C) 3.2N
D) 8.0N
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The correct answer is B .
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Question 118: Which of the following is a characteristics of stationary waves?
Options:
A) They are formed by two identical waves travelling in opposite directions
B) they can be transverse or longitudinal
C) The distance between two successive nodes is one wavelenght
D) The antinode is a point of minimum displacement
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The correct answer is A .
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Question 119: If a heavy barrel is rolled up a plane inclined at 30° to the horizontal. its velocity ratio will be
Options:
A) 3.0
B) 3.1
C) 3.2
D) 2.0
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The correct answer is D .
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Question 120:
In the diagram above, determine the r.m.s current
Options:
A) 31A
B) 48A
C) 60A
D) 80A
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The correct answer is B .