Physics Past Questions

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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

2,483 questions
Question 1 of 20 2,483 total questions
Question 141
jamb 2023

The surface temperature of a swimming pool on a warm day is 25ºC and the temperature at the bottom is 15ºC. If the swimming pool has a surface area of 620 \(m^2\) and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.
[Thermal conductivity of water (k) = 0.6071 Wm-1K-1]

A2.5kw
B250kw
C300kw
D3.0kw
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Question 142
jamb 2023

Rainbow formation is as a result of the combination of which of the following phenomena?
(i) Reflection
(ii) Dispersion
(iii) Total internal reflection
(iv) Refraction

A(ii) and (iv) only
B(i), (iii) and (iv) only
C(ii), (iii) and (iv) only
D(i), (ii) and (iv) only
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Question 143
jamb 2023

Name the type of equilibrium for each position of the ball

AA - unstable, B - neutral, C - stable
BA - stable, B - neutral, C - unstable
CA - stable, B - unstable, C - neutral
DA - unstable, B - stable, C - neutral
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Question 144
jamb 2023

The number of holes in an intrinsic semiconductor

Ais not equal to the number of free electrons
Bis greater than the number of free electrons
Cis equal to the number of free electrons
Dis less than the number of free electrons
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Question 145
jamb 2023

The half life of a radioactive material is 12 days. Calculate the decay constant.

A0.8663 \(day^{-1}\)
B0.04331 \(day^{-1}\)
C0.17325 \(day^{-1}\)
D0.05775 \(day^{-1}\)
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Question 146
jamb 2023

A lorry accelerates uniformly in a straight line with acceleration of  \(4ms^-2\) and covers a distance of 250 m in a time interval of 10 s. How far will it travel in the next 10 s?

A650
B900
C800
D250
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Question 147
jamb 2023

The terminals of a battery of emf 24.0 V and internal resistance of 1.0 Ω is connected to an external resistor 5.0 Ω. Find the terminal p.d.

A18.0V
B12.0V
C16.0V
D20.0V
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Question 148
jamb 2023

Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^3 kgm-3 and the air above is at a pressure of 101.3 kPa.

[Take g = 9.8 ms-2]

A422.7
B220.14
C464.53
D321.74
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Question 149
jamb 2023

On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?

 

A70
B62
C80
D42
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Question 150
jamb 2023

A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.

[Take g = 10 ms-2]

A195
B271 m
C391 m
D136 m
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Question 151
jamb 2023

Find the tension in the two cords shown in the figure above. Neglect the mass of the cords, and assume that the angle is 38° and the mass m is 220 kg

 

[Take g = 9.8 ms-2]

A\(T_1\) = 2864 N, \(T_2\)= 3612 N
B\(T_1\)= 3612 N, \(T_2\) = 2864 N
C\(T_1\)= 3502 N, \(T_2\)= 2760 N
D\(T_1\) = 2760 N, \(T_2\) = 3502 N
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Question 152
jamb 2023

Which of the following statements regarding the application of electrical conduction via gases is/are correct?
Electrical conduction in gas is applied in:
(i) The identification of gases
(ii) Lighting/fluorescent tubes
(iii) Photocells
(iv) Cathode ray oscilloscope/T.V. tubes

 

A(i), (iii) and (iv) only
B(i), (ii) and (iv) only
C(ii), (iii) and (iv) only
D(i), (ii) and (iii) only
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Question 153
jamb 2023

The property of wave shown in the diagram above is?
 

ADiffraction
BRefraction
CPolarisation
DInterference
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Question 154
jamb 2023
Which wave property is unchanged when a wave enters a new medium?
Adirection
Bfrequency
Cwavelength
Dspeed
Question 155
jamb 2023
When a submerged object is totally immersed, the upthrust equals the weight of the
Aair displaced
Bobject
Cobject minus its weight
Dfluid displaced
Question 156
jamb 2023
Light is a form of
Aforce
Bmatter
Cpressure
Denergy
Question 157
jamb 2023
The acceleration due to free fall at the surface of the earth is approximately
A10.8 m/s??
B8.8 m/s??
C9.8 m/s??
D3.0 m/s??
Question 158
jamb 2023
Ohm's law states V =
AI+R
BIR
CR/I
DI/R
Question 159
jamb 2023
The energy possessed by a body due to its position is
Asound energy
Bkinetic energy
Cpotential energy
Dheat energy
Question 160
jamb 2023
The unit of power is the
Apascal
Bnewton
Cjoule
Dwatt
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