- 1. Which of the following quantities is not an example of force?
A) Weight
B) Mass
C) Tension
D) Friction
- 2. The reason for laminating the soft iron core of a transformer is to?
A) reduce its efficiency
B) reduce eddy current.
C) reduce magnetic flux
D) increase the magnetic flux.
- 3. Formation of hydrogen bubbles at the copper plate of a primary cell is called?
A) electrolysis
B) polarization.
C) local action
D) back e.m.f.
- 4. Which of the following factors does not affect the rate of evaporation of a liquid?
A) wind
B) volume
C) surface area
D) temperature
- 5. Opening in the eye through which light passes to the retina is called the?
A) iris
B) pupil
C) cornea
D) optic nerve
- 6. Electric motor primarily converts?
A) electrical energy to chemical energy.
B) electrical energy to mechanical energy
C) kinetic energy to potential energy
D) electrical energy to heat energy.
- 7. A heat sensitive resistor made of a semiconductor is called?
A) thermometer.
B) thermistor
C) thermopile
D) thermostat.
- 8. Which of the following statements about the molecules of solids and liquids is correct? They both
A) exhibit random motion
B) have wide separations
C) have weak attraction
D) exhibit vibratory motion
- 9. The distance between a node and its adjacent antinode of a transverse wave is equal to?
A) thrice the wavelength
B) the wavelength
C) half of the wavelength
D) quarter of the wavelength
- 10. Which of the following actions will increase capacitance of a parallel plate capacitor?
I. Decreasing the distance between the plates
II. Increasing the distance between the plates.
III. Increasing the area of the plates overlap.
IV. Avoiding the use of dielectric between the plate
A) I and IV
B) I and III only
C) II and III only
D) III and IV only
- 11. A metallic sphere is heated from 27°C to 200°C Without change of state. Which of the following changes would have resulted from the heating?
A) Its volume increases without a change in density
B) Its volume increases and its density decrease
C) Its volume increases without a change in density
D) Its volume increases and its density increases
- 12. The acceleration of a moving object can be determined from the?
A) area under its velocity-time graph
B) slope of its distance-time graph.
C) slope of its velocity-time graph.
D) area under its distance-time graph.
- 13. A student wishes to measure the potential difference across a resistor,R. She has a galvanometer,G and some connecting wires.
What else does she need?
A) high value resistor connected in parallel with G
B) low value resistor connected in parallel with G low value
C) resistor connected in series with G
D) high value resistor connected in series with G
- 14. The handle of a screw jack is 35 cm long and the pitch of the screw is 0.5 cm. What force must be applied at the end of the handle to lift a load of 2000N, if the efficiency of the jack is 30% [π = 227
]?
A) 15.2N
B) 152.0N
C) 132.0N
D) 440.0N
- 15. The inductive reactance in a circuit of frequency 100Hz is 1ohms. Calculate the inductance of the inductor[π = 3.14]
A) 1.09 x 10−3 H
B) 1.59 x 10−3 H
C) 2.00 x 10−3 H
D) 6.28x 10−3 H
- 16. An atom that emits an a-particle?
A) becomes a daughter of a different element always
B) daughter with increased mass.
C) becomes a different isotope of the element.
D) may become a different element
- 17. Which of the following units is equivalent to the unit of electric current?
A) J s−1
B) C
C) C s−1
D) W
- 18. A ball is swung in a horizontal circle of centre O with a constant speed. What is the direction of its acceleration?
A) Away from O
B) Along the Circumference of the circle
C) Along a tangent to the circle
D) Toward centre O
- 19. Which of the following statements is an effect of compressing gas molecules at constant temperature?
A) The pressure on the molecules decreases.
B) The molecules make more impact per second on the walls of the container
C) The molecules increase in size
D) The molecules gain more kinetic energy.
- 20. A current of 2A passes through a wire of resistance 4Ω for 3 minutes. Calculate the energy lost.
A) 2880J
B) 48J
C) 1440J
D) 960J
- 21. Which of the following statements about the universal gravitational constant, G, is true?
A) It has dimension M-¹L³T-²
B) It is a vector quantity
C) t is fundamental quantity
D) Its S.I. unit is N m2 kg
- 22. Which of the following curved surfaces will produce a real image? I. Concave mirror II. Convex mirror III. Diverging lens IV. Converging lens
A) I, II and IV only
B) I and III only
C) II, III and V only
D) I and IV only
- 23. The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.
A) (2.5, -4 .8)
B) (14.7, 1.4)
C) (3.7, 7.4)
D) (6.2, 9.9)
- 24. Which of the arrangements of radiations below shows decreasing order of wavelengths?
A) Infrared radiations > radio waves > X-rays
B) Radio waves> infrared radiations > X-rays
C) X-rays> infrared radiations > radio waves
D) X-rays> radio waves > infrared radiations
- 25. An electric pressing iron is connected to the mains using an insulated wire. wire becomes very hot.
The heat generated in the wire can be minimized by replacing the wire with one of?
A) greater diameter
B) thicker insulation
C) thinner insulation
D) smaller diameter.
- 26. Determine the speed of the wave.
A) 72 cm/s
B) 24 cm/s
C) 64 cm/s
D) 32 cm/s
- 27. A wire of cross-sectional area 2π x 10−8
m2
and resistivity 1.1 x 10−8
Ω m, has a resistance of 21Ω.
Calculate the length of the wire. [π=22/7]
A) 120 m
B) 180 m
C) 240 m
D) 140 m
- 28. Which of the following statements best describes the particles in a solid at room temperature? They are
A) close together and moving randomly
B) far apart and moving randomly.
C) close together and vibrating
D) close together and stationary.
- 29. A man weighing 200 N runs up a staircase in 5s. If the height of the staircase is 9 m, calculate the power of the man.
A) 360 W
B) 1000 W
C) 40 W
D) 1800 W
- 30. A rotating disc contains a set of holes in a circle. An air jet is directed onto the holes and a note of frequency 480 Hz is produced. If the number of holes is 20, calculate the speed of rotation of the disc.
A) 8 rev/s.
B) 10 rev/s
C) 24 rev/s
D) 20 rev/s
- 31. A force of 10 N, acting continuously, increases the kinetic energy of an object from 20.J to 60 J. Find the distance moved by the object.
A) 4m
B) 40m
C) 200m
D) 400m
- 32. An electric circuit consists of a resistor. a battery and a key. If the voltage of the battery is increased, there Would be an increase in the?
A) resistance and temperature only
B) current and resistance only
C) current and temperature only
D) current resistance and temperature
- 33. A radioactive material has a half-life of 1.0 hour If 200.0 g of it was present at 6 a.m. on a certain day, how many grams will have decayed by 9 a.m. on the same day?
A) 175.0 g
B) 150.0 g
C) 187.5 g
D) 100.0 g
- 34. The following statements about a loudspeaker are correct except?
A) its contains a permanent magnet
B) the magnetic force on the speech coil is uni-directional
C) the current in the speech coil creates a magnetic force on the coil
D) sound signal converted to varying current signal enters the speech coil.
- 35. An ice cube has mass of 20 g at 5°C. Calculate the energy required to raise its temperature to 0°C. [Specific heat capacity of ice = 2.1 J/g°c]
A) 42 J
B) 105 J
C) 210 J
D) 100 J
- 36. A stone is thrown horizontally with initial velocity 15m/s from a tower 20 m high. How long does it take to reach the ground? [g= 10m/s2
a
2s
b
4s
c5s
d
1s
A) 1s
B) 2s
C) 4s
D) 5s
- 37. Which of the following statements is not a characteristic of a plane progressive wave?
A) Energy travels out through the medium
B) Neighboring points along the profile possess different amplitudes
C) Neighboring particles vibrate with different phase
D) Neighboring points along the profile possess the same amplitude
- 38. The electrons in a cathode-ray tube are produced by?
a
heating a metal filament.
b
ionization of the air.
c
applying a magnetic field to the y-plates.
c
applying an electric field to the x-plates.
A) ionization of the air
B) applying a magnetic field to the y-plates.
C) applying an electric field to the x-plates.
D) heating a metal filament
- 39. Which of the following statements about distance and displacement is not correct?
a
Displacement is a vector quantity.
b
Distance has dimension
c
Displacement is measured in meters.
d
Distance is a vector quantity.
A) Displacement is a vector quantity.
B) Distance is a vector quantity
C) Distance has dimension
D) Displacement is measured in meters.
- 40. According to Pascal's principle, the pressure in a fluid is always?
A) transmitted equally in all directions
B) increasing with height
C) distributed partially in all directions
D) dependent on density of the fluid
- 41. Which of the following set of quantities have members which are all vectors?
A) Pressure, energy and force
B) Distance, acceleration and work
C) Force, displacement and momentum
D) Distance, acceleration and work
- 42. If the relative humidity of the atmosphere increases, the rate of evaporation of sweat from the human body?
A) increases then decreases
B) decreases
C) increases
D) remains the same
- 43. Which of the following factors is not among that determines the resistance of a wire?
A) length
B) cross-sectional area
C) mass
D) material
- 44. Which of the following scientist suggested that moving particles exhibit wave properties?
A) Isaac Newton
B) Louis de Broglie
C) J.J. Thompson
D) Ernest Rutherford
- 45. Which of the sketched graphs above illustrates the correct variation of the gravitational force, Fg between two objects and the distance, d, between the centre
A) B
B) D
C) A
D) C
- 46. The diagram above is an illustration of an a.c. circuit.Calculate the reactance of the capacitor.
A) 2016Ω
B) 4000Ω
C) 2000Ω
D) 200Ω
- 47. The area under a force-time graph represents--------
A) change in momentum
B) change in work done
C) change in kinetic energy
D) change in internal energy
- 48. From the principle of flotation, a body sinks in a fluid until it displace a quantity equal to its own?
A) mass
B) density
C) weight
D) weight
- 49. An example of a mechanical wave is---------
A) radio waves
B) x-rays
C) water waves
D) light rays
- 50. Which of the following descriptions of the image formed by a plane mirror is not correct. the image is----
A) erect and of the same size as the object
B) laterally inverted and of the same size as the object
C) erect and bigger than the object
D) virtual and if the same size
- 51. A freely suspended compass needle on the earth's surface settles in a plane called----------
A) geographic meridian
B) magnetic declination
C) isoganals
D) magnetic meridian
- 52. The periodic rise and fall in the intensity of sound produced whn two notes of nearly equal frequencies are sounded together is called?
A) interference
B) beat
C) doppler effect
D) resonance
- 53. Current is passed through two parallel conductors in the same direction. If the conductors are placed near each other, they will------------------
A) repel each other
B) remain stationary
C) move in a circle
D) attract each other
- 54. A body of mass, M, moving with velocity, V, has a wavelength, X, associated with it. This phenomenon is called----------
a
photoelectric effect
b
heisenberg's uncertainty principle
c
compton effect
d
wave-particles paradox
A) heisenberg's uncertainty principle
B) wave-particles paradox
C) compton effect
D) photoelectric effect
- 55. Which of the following statements about a straight current-carrying wire placed in a uniform magnetic field is correct? The wire experiences ---------------
A) a motor force with constant direction if either the current or the magnetic field is reversed
B) no motor force of it is parallel to the field
C) maximum motor force if the current reverses its direction
D) no motor force if it is perpendicular to the field
- 56. The speed of fast-moving neutrons in a nuclear reactor can be reduced by using?
A) concrete shield
B) graphite rods
C) boron rods
D) iron rods
- 57. In a series R-L-C circuit at resonance, impedance is----
A) capacitive
B) maximum
C) minimum
D) inductive
- 58. A lamp is rated 240 V, 60 W. Determine the resistance of the lamp when lit?
A) 120Ω
B) 540Ω
C) 240Ω
D) 960Ω
- 59. One major reason why electrical appliances in homes are normally earthed is that the-----------
A) appliances are maintained at the same p.d. with that of the earth
B) appliances are maintained at a higher p.d. than the earth
C) appliances are maintained at a lower p.d. than the earth
D) person touching the appliance is safe from electric shock
- 60. When the direction of vibration of the particles of a medium is perpendicular to the direction of propagation of a wave, the wave is said to be--------
A) transverse
B) a sound wave
C) longitudinal
D) mechanical
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