2024 Physics

1. The stress experienced by a wire of diameter y/πm loaded by a weight y²N is

• A. πNm⁻²
• B. 2πNm⁻²
• C. 4πNm⁻²
• D. 8πNm⁻²

2. Under which conditions is work done

• A. A man supports a heavy load on his head with hands.
• B. A woman holds a pot of water
• C. A boy climbs onto a table
• D. A man pushes against a stationary petrol tanker

3.

The mechanical advantage of the machine shown above 

• A. 7.5
• B. 15.5
• C. 30.0
• D. 60.0

4. Rainbow is formed when sunlight undergoes 

• A. reflection
• B. refraction
• C. dispersion
• D. diffraction

5. Find the value of a capacitor with voltage 5V and 30C.

• A. 7f
• B. 6f
• C. 15f
• D. 0.17f

6. When a bus is accelerating, it must be 

• A. changing its speed
• B. changing its velocity
• C. changing its position
• D. changing its direction

7. The friction due to air mass can be reduced by 

• A. streaming
• B. lubricating
• C. propeller
• D. polishing

8. Which of the following operates based on magnetic effect of electric current?

• A. electric heater
• B. photocell
• C. Dynamo
• D. Cold cathode

9. When a charged ebonite rod is brought near a charged glass rod, there will be 

• A. attraction
• B. repulsion
• C. spark
• D. no force experienced

10. Pilots uses aneroid barometer to know the height above sea level because 

• A. Very accurate
• B. Small and convenient
• C. Heavy and huge
• D. Costly

11. A light ray passing from air into water at an angle of 30⁰ from the normal in air would 

• A. make an angle greater than 30⁰ in water surface
• B. be completely absorbed by the water surface
• C. be completely reflected by the water surface
• D. make an angle less than 30⁰ from the normal in water

12. A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is 2700kgm⁻¹. Find the mass of the cube.

• A. 7.5g
• B. 9.1g
• C. 12.0g
• D. 15.0g

13

The value of R required to make the galvanometer measure voltage up to 40V in the diagram above 

• A. 1885Ω
• B. 1990Ω
• C. 1995Ω
• D. 1100Ω

14. 5 X 10⁻³kg of liquid at its boiling point is evaporated in 20s by the heat generated by a resistor of 2ΩΩ when a current of 10A is used. The specific latent heat of vaporization of the liquid is 

• A. 8.0 x 10⁴Jkg⁻¹
• B. 8.0 x 10⁵Jkg⁻¹
• C. 8.0 x 10⁶Jkg⁻¹
• D. 8.0 x 10⁷Jkg⁻¹

15. If the S.V.P of water vapour was 13.5mmHg at 33⁰C and 7.3mmHg at 7⁰C. Find the percentage relative of the air on a day when average air temperature was 33⁰C and dew point was 7⁰C.

• A. 55%
• B. 60%
• C. 54%
• D. 51%

16. Electrolysis can be investigated using 

• A. Voltmeter
• B. Ammeter
• C. Galvanometer
• D. Voltameter

17. A wheelbarrow inclined at 60⁰ to the horizontal is pushed with a force of 150N. What is the horizontal component of the applied force

• A. 130N
• B. 75N
• C. 60N
• D. 50N

18. In a solar panel, solar beam is concentrated by using 

• A. Concave mirror
• B. Convex mirror
• C. Plane mirror
• D. Triangular mirror

19. A rectifier is a device that changes 

• A. D.C to D.C
• B. D.C to A.C
• C. A.C to A.C
• D. A.C to D.C

20. The dimension of young’s modulus, E is given by 

• A. MLT⁻¹
• B. MT⁻²
• C. ML⁻¹T⁻²
• D. M⁻¹T

21. The moon’s acceleration due to gravity is 1/6 of the earth’s value. The weight of a bowling ball on the moon would be

• A. 6 times its weight on the earth
• B. 1/6 of its weight on the earth
• C. 36 times its weight on the earth
• D. equal to its weight on the earth

22. If a sheet of an insulating material is inserted between the plates of an air capacitor, the capacitance will

• A. become zero
• B. decrease
• C. increase
• D. remain unchanged

23. 288KJ is conducted across two opposite faces of a 3m cube of temperature gradient 90⁰Cm⁻¹in 7200s. Calculate the thermal conductivity.

• A. 4.9 x 10⁻²Wm⁻¹k⁻¹
• A. 5.0 x 10⁻²Wm⁻¹k⁻¹
• C. 5.2 x 10⁻²Wm⁻¹k⁻¹
• D. 5.1 x 10⁻²Wm⁻¹k⁻¹

24. A sonometer’s fundamental note is 50Hz, what is the new frequency when the tension is four times the original?

• A. 25Hz
• B. 100Hz
• C. 200Hz
• D. 250Hz

25. Which of the following is not a part of model rocket?

• A. The body tube
• B. The nose cones
• C. The fin
• D. Not recovery devices

26. A thick glass tumbler cracks when boiling water is poured into it because

• A. The inside expands more rapidly than the outside
• B. The inside expands less rapidly than the outside
• C. The expansion is even
• D. It does not expand

27. How much joules of heat are given out when a piece of iron, of mass 60g and specific heat capacity 460JKg⁻¹K⁻¹, cools from 75⁰C to 35⁰C

• A. 1000J
• B. 1050J
• C. 1067J
• D. 1104J

28. The energy of light of frequency 2.0 x 10¹⁵Hz is  (h = 6.63 x 10⁻³⁴Js)

• A. 3.33 x 10⁻¹⁸J
• B. 1.33 x 10⁻¹⁸J
• C. 1.33 x 10⁻¹⁹J
• D. 3.33 x 10⁻¹⁹J

29. A mass of gas at 40mmHg is heated from 298k to 348k at constant volume. Cal the pressure exerted by the gas.

• A. 50.21mmHg
• B. 46.71mmHg
• C. 42.35mmHg
• D. 35.12mmHg

30. The distance between two successive crests of a water wave is 0.25m. If a particle on the surface of the water makes four complete vertical oscillations in one second. Calculate the speed of the wave.

• A. 4ms⁻¹
• B. 3ms⁻¹
• C. 2ms⁻¹
• D. 1ms⁻¹

31. The thermometer whose thermometric property is change in volume with temperature is 

• A. Resistance thermometer
• B. Thermocouple
• C. Bimetallic thermometer
• D. Liquid-in-glass thermometer

32. In a series resonant circuit, the current flowing in the circuit is 

• A. maximum
• B. minimum
• C. zero
• D. unaffected

33. If a body in linear motion changes from point P to Q, the motion is 

• A. Translational
• B. Rotational
• C. Simple harmonic
• D. Circular

34. Which of these gas laws is equivalent to workdone

• A. Charle’s law
• B. Pressure law
• C. Boyle’s law
• D. Gay Lussac’s law

35. The process of adding impurities to a semiconductor material to increase its conductivity is 

• A. Rectification
• B. Emission
• C. Doping
• D. Stabilization

36. A load of 300N is to be lifted by a machine with a velocity ratio of 2 and an efficiency of 60%. What effort will be applied to lift the load?

• A. 100N
• B. 150N
• C. 250N
• D. 400N

37. The average translational kinetic energy of gas molecules depends on 

• A. Temperature only
• B. Number of moles and temperature
• C. Pressure and temperature
• D. Pressure only

38. The fourth overtone of a closed pipes is 900Hz, its fundamental frequency is 

• A. 50Hz
• B. 100Hz
• C. 200Hz
• D. 400Hz

39. A cell of internal resistance of 2Ω supplies current through a resistor, X if the efficiency of the cell is 75%, find the value of X.

• A. 2Ω
• B. 4Ω
• C. 6Ω
• D. 8Ω

40. In voltage measurement, the potentiometer is preferred to voltmeter because it

• A. has a wider range
• B. consumes negligible current
• C. is bulky
• D. responds faster than voltmeter

41. Which of the following is the best as shaving mirror?

• A. Concave mirror
• B. Convex mirror
• C. plane mirror
• D. parabolic mirror

42. A refrigerator uses 150W. If it is kept on for 336 hours non-stop, what is the energy consumed in KWh?

• A. 60.20KWh
• B. 50.40KWh
• C. 25.01KWh
• D. 30.20KWh

43. What is the inductance reactance of a coil of 7H when connected to a 50Hz a.c circuit?

• A. 2200Ω
• B. 2000Ω
• C. 1200Ω
• D. 1100Ω

44. If a charge ion goes through a combined electric field E and magnetic field B, the resultant emergent velocity of the ion is 

• A. E/B
• B. EB
• C. B/E
• D. E-B

45. In electrolysis, when same quantity of electricity is passed through different electrolytes, mass of substances deposited is proportional to 

• A. Molecular weight
• B. Chemical equivalent
• C. Atomic number
• D. Chemical equivalent per valency

46. If the rate of evaporation is y, and the rate of condensation is x, then, a vapour is saturated when 

• A. x > y
• B. x
• C. x = y
• D. x ≤ y

47. The degree of precision of a vernier caliper is 

• A. 0.005cm
• B. 0.01cm
• C. 0.1cm
• D. 1.0cm

48. According to kinetic theory of gases, the pressure exerted by the gas on the wall is equal

• A. change in momentum per unit volume
• B. rate of change of momentum imparted by the walls per second per unit area
• C. momentum imparted to the walls per unit area
• D. change in momentum imparted to the walls per unit area

49. The property by which a material returns to its original shape after the removal of force is called 

• A. Elasticity
• B. Ductility
• C. Malleability
• D. Plasticity

50. The energy in a moving car is an example of 

• A. Mechanical energy
• B. Electrical energy
• C. Potential energy
• D. Kinetic energy