Physics Past Questions

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

48 questions
Question 1 of 20 48 total questions
Question 1
jamb 1979
fig 12 shows the velocity time graph of a car which starts from rest and is accelerated uniformly at the rate of 3m sec-2 for 5 seconds. It attains a velocity which is maintained for a minute, The car is then brought to rest by a uniform retardation after another 3 seconds. calculate the total distance covered
A900m
B1920m
C960m
D860m
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Question 2
jamb 1979

An electrical circuit is connected up as shown above, which of the following is correct about the value of current flowing through the 1 ohm resistance?

A12/13A
B13/12A
C1/3A
D3A
E12/7A
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Question 3
jamb 1979

fig 10 shows a see-saw which is perfectly in balance, the weighs of the people sitting on it are 50kg, xkg and 15kg as shown, the sit at distances of 1.5, 1.5 and 2m from the pivot respectively. The vale of X is

A30
B35
C70
D24.25
Eimpossible to find
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Question 4
jamb 1979
For the wave motion represented above

The wavelength is given by
Ap
Bq
Cr
Ds
Et
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Question 5
jamb 1979
Fig 8 shows a current I flowing in a copper wire situated in a magnetic field existing between the pole-pieces of a horse-shoe magnet.
Which of the following statements is correct?
AThe wire will experience a force in the direction into the paper
BThe wire will experience a force in the direction out of the paper
CThe wire will vibrate in a direction into and out of the paper
Dthe wire will move in the direction of the field i.e toward the s-pole
Ethe wire will not move because it is made of copper which is non magnetic
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Question 6
jamb 1979
A uniform bean HK of length 10m and weighing 200N is supported at both ends as shown above. A man weighing 1000N stands at a point P on the beam. If the reactions at point H an K respectively are 800N and 400N, Then the distance HP is
A4m
B3.5m
C3m
D\( 6 \frac{2}{3} \)m
E7m
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Question 7
jamb 1979

In a resonance tube experiment, which is illustrated above, the velocity of sound in air is 327.68m/s, the frequency of the turning fork used is therefore?

A128HZ
B256HZ
C512HZ
D768HZ
E1024HZ
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Question 8
jamb 1979

An air column 10cm in length is trapped into the sea end of a capillary tube by a 15cm column of mercury with the tube held vertically as shown above. On inverting the tube the air column becomes 15cm long. The atmospheric pressure during the experiment is

A90cm
B76cm
C75cm
D60cm
E50cm
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Question 9
jamb 1979

In a given circuit, the cell P has an emf 1.5V and an unknown internal resistance while cell Q has an emf 2.0V and an internal resistance of 1 ohm if the ammeter reads 50m A, Then r is equal to

A0.5 ohm
B0.62 ohm
C1.0 ohm
D2.0 ohm
E3.0 ohm
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Question 10
jamb 1979

The diagram shows lens arrangement in

AA Compound Microscope
Bastronomical telescope
Cbinocular
Dperiscope
Eprojection lantern
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Question 11
jamb 1979

A concave lens of focal length 20cm form an image 1/2 the size of the object. The object distance is

A100cm
B\( \frac{100}{q} \)
C60cm
D\( \frac{60}{7} \)
ENone of the above
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Question 12
jamb 1979
Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent
Aheat loss due to conduction
Bvacuum loss
Cheat entry into the inner flask due to convection
Dheat loss due to radiation
Eheat loss due to convection
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Question 13
jamb 1979

Radio carrier waves are generated by causing electrons to oscillate rapidly in

Aa microphone
Ba television camera
Can antenna
Dcoaxial cables
Ea transmitter
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Question 14
jamb 1979

A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the left is a 500-gram weight 20cm from the fulcrum, and a 200-gram weight x cm away from the fulcrum. What is the value of x that will make the lever balanced?

A50cm
B20cm
C10cm
D30cm
E70cm
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Question 15
jamb 1979
It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus?
Aan electron
Ba \(\beta\)-particle
Can \(\alpha\)-particle
Da proton
Ean atom
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Question 16
jamb 1979

A body is released from rest and allowed to fall freely from a given height under gravity. The kinetic energy at its half-way point is?

Aa little above half of its initial energy
Ba little below half of its initial energy
Ca half of its initial energy
Da little above its initial energy
Ea little below its initial energy
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Question 17
jamb 1979
On which of the following is the operation of a moving coil galvanometer based?
AMagnetic effect of electric current
BElectromagnetic induction
CChemical reaction produced by electricity
DForce on current carrying conductor in a magnetic field
EElectrical energy and power
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Question 18
jamb 1979
The speed of light in air is 3 x 108ms-1. If the refractive index of light from air-to-water is \(\frac{4}{3}\), then which of the following is the correct value of the speed of light in water?
A4 x 108ms-1
B2.25 x 108ms-1
C\(\frac{4}{9}\) x 108ms-1
D2.25 x 102ms-1
E4.33 x 108ms-1
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Question 19
jamb 1979
All the heat generated in a 5 ohms resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid?
A120J
B60Jg-1
C120Jg-1
D1500J
E1500Jg-1
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Question 20
jamb 1979
Which of the following electromagnetic waves has the shortest wavelength?
ARadio waves
BX-rays
CInfra-red
DBlue light
EUltraviolet
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