- 1. 1. Which of the following quantities is not an example of force?
A) Tension
B) Weight
C) Friction
D) Mass
- 2. 2. The reason for laminating the soft iron core of a transformer is to?
A) reduce its efficiency.
B) reduce magnetic flux.
C) reduce eddy current.
D) increase the magnetic flux.
- 3. 3. Formation of hydrogen bubbles at the copper plate of a primary cell is called?
A) back e.m.f.
B) local action.
C) polarization.
D) electrolysis.
- 4. 4. Which of the following factors does not affect the rate of evaporation of a liquid?
A) temperature
B) surface area
C) wind
D) volume
- 5. 5. Opening in the eye through which light passes to the retina is called the?
A) cornea.
B) optic nerve.
C) pupil
D) iris
- 6. 6. A heat sensitive resistor made of a semiconductor is called?
A) . thermostat.
B) thermopile.
C) thermometer.
D) thermistor
- 7. 7. Electric motor primarily converts?
A) electrical energy to heat energy.
B) electrical energy to chemical energy.
C) electrical energy to mechanical energy.
D) kinetic energy to electrical energy
- 8. 8. Which of the following statements about the molecules of solids and liquids is correct? They both
A) have weak attraction.
B) have wide separations.
C) exhibit random motion.
D) exhibit vibratory motion.
- 9. 9. The distance between a node and its adjacent antinode of a transverse wave is equal to?
A) the wavelength.
B) thrice the wavelength.
C) quarter of the wavelength.
D) . half of the wavelength.
- 10. 10. 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) C
B) D
C) A
D) B
- 11. 11. 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 III only
B) II and III only
C) . III and IV only
D) I and IV
- 12. 12. 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 and its density decrease
B) Its volume increases and its density increases
C) No changes occur in its volume and density
D) Its volume increases without a change in density
- 13. 13. The acceleration of a moving object can be determined from the?
A) area under its velocity-time graph
B) area under its distance-time graph.
C) slope of its velocity-time graph.
D) slope of its distance-time graph.
- 14. 14. 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) . resistor connected in series with G
B) low value resistor connected in parallel with G low value
C) high value resistor connected in series with G.
D) high value resistor connected in parallel with G
- 15. 15. 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 = 22/7]?
A) 15.2N
B) 440.0N
C) 152.0N
D) 132.0N
- 16. 16. The inductive reactance in a circuit of frequency 100Hz is 1ohms. Calculate the inductance of the inductor[π = 3.14]
A) 1.59 x 10−³H
B) 1.09 x 10−³H
C) D. 6.28x 10−³H
D) 2.00 x 10−³H
- 17. 17. The diagram above illustrates the velocity-time graph of a body. Calculate the distance covered by the body during the motion
A) 72m
B) 48m
C) 84m
D) 15m
- 18. 18. An atom that emits an a-particle?
A) becomes a different isotope of the element.
B) daughter with increased mass.
C) becomes a daughter of a different element always.
D) may become a different element.
- 19. 19. Which of the following units is equivalent to the unit of electric current?
A) C
B) W
C) C s−1
D) J s−1
- 20. 20 A ball is swung in a horizontal circle of centre O with a constant speed. What is the direction of its acceleration?
A) Along a tangent to the circle
B) Along the Circumference of the circle
C) Toward centre O
D) Away from O
- 21. 21. Which of the following statements is an effect of compressing gas molecules at constant temperature?
A) The molecules increase in size.
B) The molecules make more impact per second on the walls of the container.
C) . The pressure on the molecules decreases.
D) The molecules gain more kinetic energy.
- 22. 22. The diagram above is an illustration of an a.c. circuit.Calculate the reactance of the capacitor.
A) 2016Ω
B) 200Ω
C) 2000Ω
D) 4000Ω
- 23. 23. A current of 2A passes through a wire of resistance 4Ω for 3 minutes. Calculate the energy lost. .
A) 960J
B) 2880J
C) 1440J
D) 48J
- 24. 24. Which of the following statements about the universal gravitational constant, G, is true?
A) It is fundamental quantity.
B) It is a vector quantity
C) It has dimension M-¹L³T-².
D) Its S.I. unit is N m2kg
- 25. 25 The sketched graph above represents a progressive wave moving from the left to the right. The period of the wave is 0.125s.
Determine the values of the amplitude and wavelength, respectively, of the wave.
A) 8 cm; 27 cm
B) 16 cm; 27 cm
C) 4 cm; 9 cm
D) 8 cm; 9 cm
- 26. 26. Determine the speed of the wave.
A) 32 cm/s
B) 72 cm/s
C) 64 cm/s
D) 24 cm/s
- 27. 27. 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) I and IV only
D) II, III and V only
- 28. 28. 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) (6.2, 9.9)
B) (3.7, 7.4)
C) (2.5, -4 .8).
D) (14.7, 1.4)
- 29. 29. Which of the arrangements of radiations below shows decreasing order of wavelengths?
A) X-rays> radio waves > infrared radiations
B) Infrared radiations > radio waves > X-rays
C) X-rays> infrared radiations > radio waves
D) Radio waves> infrared radiations > X-rays
- 30. 30. 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) thicker insulation.
B) smaller diameter.
C) greater diameter.
D) thinner insulation.
- 31. 31. In the diagram above, a bulb is lit by drawing 2.0A from 440V a.c. source. Calculate the cost of keeping the bulb on for two days at $0.40 per kilowatt-hour.
A) $84.48
B) $16.90
C) $1690.00
D) $8.48
- 32. 32. 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) 140 m
B) 120 m
C) 240 m
D) 180 m
- 33. 33. 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) 1800 W
B) 1000 W
C) 360 W
D) 40 W
- 34. 34. 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) 10 rev/s
B) 20 rev/s
C) 8 rev/s.
D) 24 rev/s
- 35. 35. 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) 200m
B) 40m
C) 400m
D) 4m
- 36. 36. 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) current and temperature only.
B) current resistance and temperature.
C) current and resistance only.
D) resistance and temperature only
- 37. 37.
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) 187.5 g
B) 175.0 g
C) 150.0 g
D) 100.0 g
- 38. 38. The following statements about a loudspeaker are correct except?
A) it 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.
- 39. 39. 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) 210 J
B) 100 J
C) 105 J
D) 42 J
- 40. 40 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) 5s
C) 4s
D) 1s
- 41. 41. Which of the following statements is not a characteristic of a plane progressive wave?
A) . Neighboring points along the profile possess the same amplitude
B) Energy travels out through the medium
C) Neighboring points along the profile possess different amplitudes
D) Neighboring particles vibrate with different phase
- 42. 42. 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 the same amplitude
C) Neighboring particles vibrate with different phase
D) Neighboring points along the profile possess different amplitudes
- 43. 43 The electrons in a cathode-ray tube are produced by?
A) ionization of the air.
B) heating a metal filament.
C) applying a magnetic field to the y-plates.
D) applying an electric field to the x-plates. By
- 44. 44.Which of the following statements about distance and displacement is not correct?
A) Displacement is measured in meters.
B) Distance is a vector quantity.
C) Distance has dimension
D) Displacement is a vector quantity.
- 45. 45. A note produced by an instrument is distinguished from a similar note produced by another instrument by the?
A) intensity,
B) loudness
C) pitch.
D) overtones.
- 46. 46. According to Pascal's principle, the pressure in a fluid is always?
A) increasing with height.
B) distributed partially in all directions.
C) transmitted equally in all directions.
D) dependent on density of the fluid.
- 47. 47. Which of the following set of quantities have members which are all vectors?
A) Density, volume and weight
B) Distance, acceleration and work
C) Pressure, energy and force
D) Force, displacement and momentum
- 48. 48. If the relative humidity of the atmosphere increases, the rate of evaporation of sweat from the human body?
A) decreases
B) increases then decreases
C) increases
D) remains the same
- 49. 49. Which of the following factors is not among that determines the resistance of a wire?
A) cross-sectional area
B) length
C) mass
D) material
- 50. 50. Which of the following scientist suggested that moving particles exhibit wave properties?
A. Isaac Newton
A) Louis de Broglie
B) J.J. Thompson
C) Ernest Rutherford
D) Isaac Newton
|