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 271: A perfect emitter or absorber of radiant energy is a
Options:
A) conductor
B) black body
C) white body
D) red body
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The correct answer is B .
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Question 272:
Which of the following media allow the transmission of sound waves through them?
I. air
II. liquid
III. solids
Options:
A) I and II only
B) I and III only
C) II and III only
D) I, II and III
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The correct answer is D .
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Question 273: Which gas produces a pink coloured light in a discharge tube?
Options:
A) Mercury
B) Argon
C) Air
D) Neon
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The correct answer is C .
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Question 274: What is the least possible error encountered when taking measurement with a meter rule?
Options:
A) 0.1mm
B) 1.0mm
C) 0.5mm
D) 0.2mm
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The correct answer is C .
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Question 275:
When the plate area of a capacitor increases?
Options:
A) the voltage can withstand increase
B) the capacitance decreases
C) the capacitance is unaffected
D) the capacitance increases
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The correct answer is D .
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Question 276: The frequency of beats produced when two tunning forks of frequencies 258Hz and 270Hz are sounded close to each other
Options:
A) 6Hz
B) 264Hz
C) 528Hz
D) 12Hz
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The correct answer is D .
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Question 277: A note is called an octave of another note when
Options:
A) its frequency is twice that of the first note
B) its frequency is half of the first note
C) the notes have the same fundamental frequency
D) its periodic time is twice that of the first note
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The correct answer is A .
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Question 278: When a resistance R is across a cell, the voltage across the terminals of the cell is reduced to two-third of its normal value. The internal resistance of the cell is
Options:
A) R
B) R
C) R
D) 5R
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The correct answer is B .
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Question 279: A magnetic field is said to exist at a point if a force is
Options:
A) exerted on a stationary charge at the point
B) exerted on a moving charge at the point
C) deflected at the point
D) strengthened at the point
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The correct answer is B .
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Question 280: The areas of the effort and load pistons of a hydraulic press are 0.5m2 and 5m2 respectively. If a force F1 of 100N is applied on the effort piston, the force F2 on the load is
Options:
A) 10N
B) 100N
C) 500N
D) 1000N
E) 5000N
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The correct answer is D .