Physics Past Questions

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

50 questions
Question 1 of 20 50 total questions
Question 1
waec 2020

Which of the following statement about viscosity is not true? it

Adepends on areas of the surfaces in contact
Boccurs in fluids
Cis independent of the relative velocity of the layers
Ddepends on the tangential force between the layers
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Question 2
waec 2020

When two cells of negligible internal resistances and equal e.m.f. denoted by E\(_1\) and E\(_2\) are connected in parallel, combined e.m.f. E is given by
 

AE = E\(_1\) + E\(_2\)
B\(\frac{1}{E} = \frac{1}{E_1} + \frac{1}{E_2}\)
CE = E\(_1\) = E\(_2\)
DE = \(\frac{E_1}{E_2}\)
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Question 3
waec 2020

 In photoelectric effect, the number of electrode emitted per second from a metallic surface is proportional to the

Aintensity of the incident radiation
Bfrequency of the incident radiation
Cenergy of the incident radiation
Dwork function of the metal.
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Question 4
waec 2020

The vacuum between the double walls of a thermos flask reduces heat loss through

Aconduction and radiation
Bconvection and conduction
Cradiation only
Dconduction only
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Question 5
waec 2020

Which of the following units is not fundamental?

AMetre
BKilogram
CJoule
DCandela
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Question 6
waec 2020

A luminous object is one that

Agives off dim blue-green light only in the dark.
Bgives out light of its own
Cshines by reflected light only
Dglows only in the presence of light
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Question 7
waec 2020

 Which of the following actions would increase the electric force between two positively charged particles?
 

ADecreasing the mass of the particles
BDecreasing the distance between the particles
CIncreasing the assistance between the particles
DIncreasing the mass of the particles
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Question 8
waec 2020

A diver steps off a diving platform that is 10m above the water. If there is no air resistance during the fall, there will be a decrease in the diver's

Agravitational potential energy
Btotal mechanical energy
Ckinetic energy
Dmomentum
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Question 9
waec 2020

Which of the following statements about the process of melting of a solid are true? The temperature of the solid will 

I. remain steady until melting starts.

ll. keep rising until melting starts,

Ill remain steady as melting proceeds. 

V, keep rising as melting proceeds.

AI and llI only
BIlI and IV only
CIl and Ill only
Dll and IV only
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Question 10
waec 2020

An electron of mass 9.1x 10\(^{-31}\) kg is travelling at a speed of 2.0 x 10\(^6\)ms\(^{-1}\). Calculate the associate wavelength of the electron. [h = 6.6. x 10\(^{-34}\) Js]

A3.63 x10\(^{-10}\) m
B3.63 x 10\(^{-8}\) m
C3.63 x 10\(^{-7}\) m
D6.89 x 10\(^{-4}\) m
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Question 11
waec 2020

 A ray of light travels obliquely from a less dense medium to a denser medium. Which of the following statements is true about the light?
 

AThe wavelength of the light increases in the second medium
BThe speed of the light increases in the second medium
CThe light refracts towards the normal
DThere Is a change in the frequency of the light
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Question 12
waec 2020

An a.c. generator can be converted to a d.c. electric motor by replacing the

Aslip rings with a split ring and connecting a battery
Bsplit ring with slip rings and connecting a battery
Ca.c. with d.c. source and connecting slip rings
Da.c. with d.c. source and connecting split rings
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Question 13
waec 2020

 Water waves have a wavelength of 3.6cm and speed of 18cms\(^{-1 }\) in deep water. If the waves enter shallow water with wavelength of 2.0cm, calculate the speed of the waves in the shallow water.

A0.4cms\(^{-1}\)
B2.5cms\(^{-1}\)
C10.0cms\(^{-1}\)
D10.8cms\(^{-1}\)
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Question 14
waec 2020

Which of the following statements correctly explains why a total solar eclipse would be seen by people on only a small portion of the earth's surface? The
 

Amoon is larger in diameter than the earth
Bearth is larger in diameter than the sun
Cearth revolves around the sun
Dearth is larger in diameter than the moon.
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Question 15
waec 2020

 In an electric circuit, an inductor of inductance 0.5 H and resistance 50\(\Omega\) is connected to an alternating current source of frequency 60 Hz. Calculate the impedance of the circuit.

A50.0\(\Omega\)
B450.5 \(\Omega\)
C195.0 \(\Omega\)
D1950.1 \(\Omega\)
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Question 16
waec 2020

 In the hydraulic press, the force F applied is related to the diameter d of the cylinder by 
 

AF \(\alpha\) d\(^2\)
BF \(\alpha\) d
CF \(\alpha\) d\(^{-1}\)
DF \(\alpha\) d\(^{-2}\)
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Question 17
waec 2020

The sketched graph above illustrates the heating curve of a 0.02kg of water. Determine the approximate value of the specific latent heat of vapourization of water
 

A2.25 x 10\(^6\) J kg\(^{-1}\)
B4.17 x 10\(^3\) J kg\(^{-1}\)
C2.00 x 10\(^3\) J kg\(^{-1}\)
D1.00 x 10\(^3\) J kg\(^{-1}\)
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Question 18
waec 2020

Which of the following statements about photoelectrons is correct?

AA faint green light produces photoelectrons with less kinetic energy than a bright red light
BA red light releases a smaller number of electrons than a green light
CA faint green light produces photoelectrons with greater kinetic energy than a bright red light
DA red light produces more photoelectrons than a green light
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Question 19
waec 2020

An electron of mass m and charge e moves in a circular path in a magnetic field of flux density B. How long does it take to complete one orbit? 

A\(\frac{2me}{B\pi}\)
B\(\frac{2B}{me\pi}\)
C\(\frac{2\pi m}{Be}\)
D\(\frac{Be}{2 \pi m}\)
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Question 20
waec 2020

Which of the following statements about the motion of a simple pendulum is true?

AIt is a simple harmonic motion when the angle of displacement is large
BIt passes the equilibrium position with minimum speed
CIt possesses maximum kinetic energy at the extreme positions
Dlt swings faster at the poles than at the equator
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