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Civil and Mechanical

J physics 22

Written by Admin September 7, 2025September 7, 2025

Jamb Physics 2022

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Question 1 of 40

1. Question

A semiconductor is formed by?

co-ordinate bonds
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electrovalent bonds
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a substance free of bonds
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covalent bonds
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Question 2 of 40

2. Question

In order to view the sun, the most suitable instrument to use is?

helioscope
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telescope
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stroboscope
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sun meter
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Question 3 of 40

3. Question

An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

3 days
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2 days
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1 day
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4 days
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Question 4 of 40

4. Question

The eclipse of the moon occurs when?

the moon reflects the rays from the sun to the earth
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the moon comes exactly between the earth and the sun
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the earth comes exactly between the moon and the sun
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the sun comes exactly between the earth and the moon
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Question 5 of 40

5. Question

According to kinetic molecular model in gases,

the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern
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the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them
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the molecules are very far apart and occupy all the spaces made available to them
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the particles occur in clusters with molecules slightly further apart
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Question 6 of 40

6. Question

A magnet relay is a device used for?

reading the magnitude of magnetic flux
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controlling another circuit carrying larger current
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turning in sports
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storing magnetic field
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Question 7 of 40

7. Question

Water is not a good thermometric liquid because it?

expands unevenly between 0 ºC and 4 ºC
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maintains fixed density
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has low freezing point
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wets glass
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Question 8 of 40

8. Question

What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg⁻¹)

7.06 x 10³J
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5.38 x 10³J
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6.72 x 10³J
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1.35 x 10³J
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Question 9 of 40

9. Question

Which of the following liquid is a poor conductor of electricity?

Distilled water
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Tap water
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Sea water
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Drinking water
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Question 10 of 40

10. Question

If an object just begins to slide on a surface inclined at 30º to the horizontal,the coefficient of friction is?

√3
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√3/2
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1/√2
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1/√3
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Question 11 of 40

11. Question

A cell whose internal resistance is 0.55Ω delivers a current of 4 A to an external resistor. The lost voltage of the cell is?

4.00 V
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2.20 V
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0.15 V
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8.00 V
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Question 12 of 40

12. Question

Which of these is a second-class lever?

sugar tongs
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claw hammer
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plier
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wheelbarrow
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Question 13 of 40

13. Question

In the formation of sea breeze, wind blows from?

sky to land
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sea to sky
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land to sea
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sea to land
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Question 14 of 40

14. Question

A bar magnet is divided into two pieces, which of the following statement is correct?

two new magnets are created
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the magnetic field of each separate piece becomes stronger
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the electric field is created
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the bar magnet is demagnetized
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Question 15 of 40

15. Question

The secondary pigments consist of?

blue, green, and violet
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yellow, green, and magenta
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magenta, yellow, and cyan
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red, green, and blue
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Question 16 of 40

16. Question

A tuning fork having a frequency of 312 Hz emits a wave which has a wavelength of 1.10 m. Calculate the velocity of sound

312.0 ms^-1
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110.0 ms^-1
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343.2 ms^-1
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686.4 ms^-1
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Question 17 of 40

17. Question

When the plate area of a capacitor increases?

the voltage can withstand increase
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the capacitance decreases
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the capacitance is unaffected
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the capacitance increases
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Question 18 of 40

18. Question

A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration

3.20 ms⁻²
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0.25 ms⁻²
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0.80 ms⁻²
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4.00 ms⁻²
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Question 19 of 40

19. Question

Which of these is a derived unit?

Kilogram
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Metre
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Newton
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Second
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Question 20 of 40

20. Question

The amount of energy required to change a kilogram of ice block into water without a change in temperature is?

specific latent heat of fusion of ice
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specific heat capacity of ice
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heat capacity of ice
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specific heat of vaporization of ice
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Incorrect
Question 21 of 40

21. Question

Consider the wave equation y = 5mm sin [1cm⁻¹x - 60s⁻¹t]. The wave number is?

0.1 cm⁻¹
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10cm⁻¹
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1.0cm⁻¹
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2cm⁻¹
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Question 22 of 40

22. Question

For a pear-shaped conductor shown above, the concentration of charge on the outside is highest at?

X
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Z
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Y
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K
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Question 23 of 40

23. Question

An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?

15 cm
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70 cm
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40 cm
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20 cm
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Question 24 of 40

24. Question

A reservoir is filled with liquid of density 2000 kgm⁻¹. Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm⁻² (g = 10 ms⁻²)

0.262 m
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0.664 m
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0.819 m
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0.455 m
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Question 25 of 40

25. Question

The mercury column in the barometer at notational atmospheric pressure has a height of?

0.76 cm at see level
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760 cm at sea level
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7.6 cm at sea level
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76 cm at sea level
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Question 26 of 40

26. Question

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

the magnet is moved towards the stationary solenoid
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there is no relative motion
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the magnet is moved away from the stationary solenoid
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the solenoid is moved away from the stationary magnet
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Correct

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Question 27 of 40

27. Question

One of the following is a scalar quantity?

weight
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momentum
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potential energy
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displacement
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Question 28 of 40

28. Question

The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?

hyperbola
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parabola
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curve
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straight line
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Question 29 of 40

29. Question

Which component of fiber-optic connector has a provision of entry for the fibre along with the fixation to connector housing?

coupling device
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cable
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ferrule
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connector housing
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Question 30 of 40

30. Question

A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

2400 J
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9600 J
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1500 J
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1200 J
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Incorrect
Question 31 of 40

31. Question

Tyres are treaded to?

increase weight of tyres
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increase friction
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increase its longevity
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look good
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Question 32 of 40

32. Question

Which expression gives magnetic flux?

\( qVB \sin \theta \)
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\( \dfrac{\mu \phi I}{2 \pi r} \)
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\( BA \cos \theta \)
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\(-N \dfrac{d\phi}{dt} \)
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Incorrect
Question 33 of 40

33. Question

A train of mass 1600 kg attains a speed of 25 ms⁻¹ in 20 seconds. The power developed in the engine is?

2.5 KW
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80 KW
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25 KW
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50 KW
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Incorrect
Question 34 of 40

34. Question

The potential energy in an elastic string of force constant k, which has an extension X is?

kX
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KX²
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½KX²
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½K
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Question 35 of 40

35. Question

The gravitational pull on the moon is 1/6 that of the earth. If a body weighs 6.0 N on the moon, what will be the weight on the earth?

6.0 N
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5.0 N
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12.0 N
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36.0 N
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Question 36 of 40

36. Question

The relationship between the coefficient of linear expansion \( \alpha \) and volumetric expansion \( \gamma \) is:

\( \gamma = \alpha^{-3} \)
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\( \gamma = \alpha \)
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\( \gamma = 3\alpha \)
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\( \gamma = \alpha^3 \)
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Question 37 of 40

37. Question

Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?

formation of hydrogen bubbles on the electrode
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increase in the resistance of the cell
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local action
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polarization
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Question 38 of 40

38. Question

The vapour pressure?

increases non-linearly with measuring temperature
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increases linearly with increasing temperature
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decreases linearly with increasing temperature
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decreases non-linearly ith measuring temperature
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Question 39 of 40

39. Question

A person standing waist-deep in a swimming pool appears to have short legs because of light?

diffraction
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refraction
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reflection
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interference
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Question 40 of 40

40. Question

The main factor which affects the speed of sound wave is the?

properties of the medium
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amplitude of the sound wave
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intensity of the sound wave
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loudness of the sound wave
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