Physics Past Questions

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

150 questions
Question 1 of 20 150 total questions
Question 11
waec 2019

Which of the following devices is used for storing electric charges?

ATransformer
BAmmeter
CPotentiometer
DCapacitor
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Question 12
waec 2019

 

The diagram above illustrates a meter bridge circuit underbalanced conditions. Determine the value of x.

A50.cm
B10.0 cm
C28.6 cm
D57.2 cm
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Question 13
waec 2019

Which of the following statements is the correct reason for using soft iron in making the armature or an electric bell?

AIt is a diamagnetic material
BIt loses its magnetism readily
CIt is not easily magnetized
DIt retains its magnetism for a long time
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Question 14
waec 2019

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

Acommutator with an armature
Barmature with a commutator
Ccommutator with slip rings
Dslip rings with a commutator
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Question 15
waec 2019

The maximum and minimum thermometer reads the

Athe maximum temperature during the day and the minimum temperature at night at all times.
Bthe maximum temperature at night and minimum temperature during the day at all times
C
Dthe maximum temperature during the day and minimum temperature at night from the last reset
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Question 16
waec 2019

The mass of a load is doubled while the force acting on it is halved. The resulting acceleration of the load is

Aquadrupled
Bquartered
Chalved
Ddoubled
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Question 17
waec 2019

An 800 kg car moving at 80 km hr\(^{-1}\) collides with a 1200 kg car moving at 40 km hr\(^{-1}\) in the same direction. If the cars stick together, calculate their common velocity.

A60 km hr\(^{-1}\) 
B8 km hr\(^{-1}\)
C40 km hr\(^{-1}\) 
D56 km hr\(^{-1}\)
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Question 18
waec 2019

Which of the following graphs gives the correct relationship between energy and mass when mass is converted to energy.

 

 

AA
BB
CC
DD
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Question 19
waec 2019

Which of the following characteristics of waves can a ripple tank be used to demonstrate?
I. Reflection
II. Refraction
III. Diffraction
 

AI, II and Ill
Bll and ll only
Cl and lII only
DI and II only
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Question 20
waec 2019

In which of the following media is the speed of sound the least?

AAir
BBrass
CWater
DWood 
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Question 21
waec 2019

A transverse pulse of frequency 9 Hz traves 4.5m in 0.6 s. Calculate the wavelength of the pulse.

A3.33 m
B0.30 m
C0.83 m
D1.20 m
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Question 22
waec 2019

The wire of a platinum resistance thermometer has d resistance of 3.5\(\Omega\) at 0 °C and 10.52\(\Omega\) at 100°C. Calculate the temperature of the wire when its resistance is 7.5\(\Omega\).

A78 °C
B25 \(^o\)C
C30\(^o\)C
D57 \(^o\)C
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Question 23
waec 2019

Calculate the quantity of heat needed to change the temperature of 60g of ice at 0 °C to 80 °C. [specific latent heat of fusion of ice= 3.36 x 10\(^5\) Jkg\(^{-1}\) specific heat capacity of water 4.2 x 10\(^3\) J kg\(^{-1}\) K\(^{-1}\)]


 

A4.80 kJ
B20.16 kJ
C40.32 kJ
D22.17 kJ
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Question 24
waec 2019

A small amount of air is introduced into the vacuum above the mercury in a mercury barometer tube. The mercury level goes down because the air molecules

 

 

Aheat the mercury and make it expand
Bincrease the pressure above the mercury. 
Ccool the mercury and make it contract.
Ddecrease the pressure above the mercury
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Question 25
waec 2019

 Which of the following graphs above of a charge Q against potential difference V across the capacitor is correct?

 

AA
BB
CC
DD
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Question 26
waec 2019

A freshly demagnetized bar magnet is placed in the East-West direction to ensure that

Athe molecular magnets remain randomly arranged. 
Bthe molecular magnets are properly aligned
Cit is affected by the earth's magnetic field
Dthe magnetic domains are within the earth's field
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Question 27
waec 2019

If the efficiency of a transformer is 100%, which of the following equations would be correct? 
 

AN\(_p\)E\(_p\) = N\(_s\)E\(_s\)
BN\(_s\)I\(_p\)= N\(_p\)I\(_s\)
CN\(_s\)I\(_s\) = N\(_p\)I\(_p\)
DI\(_p\)E\(_s\) = I\(_s\)E\(_p\)
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Question 28
waec 2019

Which of the following statements about a moving object is correct?

AWhen accelerating, the resultant force acting on it must be equal to zero.
BThere must always be a non-zero resultant force acting on it.
CAt a steady velocity, the resultant force acting on it must be equal to zero
DAt a steady velocity, the air resistance must be equal to zero.
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Question 29
waec 2019

The diagram above represents an experimental set-up for verifying?

 

Alens formula
Brefraction laws
Creflection laws
Dmirror formula
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Question 30
waec 2019

The vacuum in a thermoflask reduces heat loss resulting from

Aradiation only
Bconduction and convection only
Cradiation and convection only
Dconduction only
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