Physics Past Questions

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88 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

88 questions
Question 1 of 8 88 total questions
Question 41
jamb 2020

The effect of closing the key K in the circuit shown in the figure above would be to?

Aincrease the current by 0.4A
Breduce the current by 0.4A
Cincrease the current by 0.6A
Dreduce the current by 0.6A
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Question 42
jamb 2020

In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?

 

ATemperature is a measure of the average kinetic energy of the molecules of a substance
BHeat is a measure of the total kinetic energy of the molecules in a system
CDifferent materials require different amounts of heat to cause a given change in temperature
DAll of the above
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Question 43
jamb 2020

Which of the following statements about radioactivity is true?

(i) Alpha particle is positively charged

(ii) Beta particle is negatively charged

(iii) Gamma ray is neutral

(iv) Beta particle has the  same mass as helium atom

(v) Gamma ray is charged. 

Ai, ii, iii, iv only
Bi, ii, iii only
Civ and v only
Di, ii and v only
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Question 44
jamb 2020

In what range of temperature is the expansion of water anomalous?

A+208\(^o\)C to +212\(^o\)C
B-80\(^o\)C + -76\(^o\)C
C0\(^o\)C to +4\(^o\)C
D-4\(^o\)C to +0\(^o\)C
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Question 45
jamb 2020

If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of?

A4
B\(\frac{\pi}{2}\)
C\(\frac{1}{4}\)
D2
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Question 46
jamb 2020

A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms\(^{-1}\). The recoil speed of the machine gun is 

A0.5 ms\(^{-1}\)
B1.5 ms\(^{-1}\)
C1 ms\(^{-1}\)
D2ms\(^-1\)
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Question 47
jamb 2020

The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is

A\(\frac{mv^2}{r}\)
B\(\frac{mr^2}{x}\)
C\(\frac{mr}{v}\)
D\(\frac{mv}{r^2}\)
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Question 48
jamb 2020

A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action is due to?

Aconvection
Bosmosis
Ccapillarity
Ddiffusion
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