Physics past questions: NECO SSCE 2009
44 objective questions, with answers. Free to read and practise.
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44 questions, one at a time, marked as you go or at the end. No account needed.
- 1.A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms-2)
- A.2J
- B.20J
- C.100J
- D.1000J
- E.2000J
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Answer: A 2J
- 2.A body accelerating will have a constant speed if it is
- A.falling from a height
- B.in equilibrium
- C.moving in a circular path
- D.moving in a straight line
- E.oscillating
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Answer: C moving in a circular path
- 3.A body executing simple harmonic motion has an angular speed of 2π radians. Its period of oscillation is (π 3.14).
- A.0.05s
- B.1.00s
- C.2.00s
- D.3.14s
- E.6.28s
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Answer: B 1.00s
- 4.A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave?
- A.0.5Hz
- B.4.0Hz
- C.10.0Hz
- D.100.0Hz
- E.200.0Hz
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Answer: D 100.0Hz
- 5.A projectile attains its maximum height when the angle of projection is?
- A.30°
- B.45°
- C.60°
- D.75°
- E.90°
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Answer: E 90°
- 6.A series RLC circuit is said to resonate, when
- A.capacitive reactance is zero
- B.conductance is maximum
- C.current is minimum
- D.impedance is minimum
- E.inductive reactance is zero
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Answer: D impedance is minimum
- 7.A sound wave from a ship is received 8.4s later. What is the depth of the sea? [Speed of sound in water 1500m\(s^{-1}]\)
- A.0.179km
- B.0.357km
- C.3.150km
- D.6.300km
- E.12.600km
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Answer: D 6.300km
- 8.A stone is thrown with a speed of 10ms at an angle of 30° to the horizontal, Calculate its time of flight, (g = 10m\(s^{2})\)
- A.0.5s
- B.1.0s
- C.1.7s
- D.2.0s
- E.3.4s
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Answer: B 1.0s
- 9.A transformer has an efficiency of 92.5%. the ratio number of turns in the primary coil to that in the secondary coil is 128 : 45. If the current passing through the secondary coil is 9.0A, calculate the current passing through the primary-coil.
- A.2.93A
- B.3.16A
- C.3.42A
- D.25.60A
- E.27.68A
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Answer: C 3.42A
- 10.An effort P applied at one end of a crowbar just overcomes the resistance W at the lid of a tin. The mechanical advantage of the crowbar is expressed as
- A.W + P
- B.P - W
- C.\(\frac{w}{p}\)
- D.\(\frac{p}{w}\)
- E.wp
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Answer: C \(\frac{w}{p}\)
- 11.An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jk\(g^{-1}K^{-1})\)
- A.84s
- B.112s
- C.130s
- D.168s
- E.280s
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Answer: A 84s
- 12.An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in m\(s^{-2}\)?
- A.zero
- B.2.5
- C.10
- D.12.5
- E.100
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Answer: A zero
- 13.An observer heard the sound of thunder 5.8s after the lightning flash was seen. How far was he from the source? [Speed of sound in air = 330ms-1]
- A.957m
- B.1914m
- C.3828m
- D.8700m
- E.17400m
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Answer: B 1914m
- 14.Arrange the following in the order of their increasing frequency. I. Visible light II. Gamma rays III. Radio waves IV. Infra-red radiation V. Ultra-violet radiation
- A.I, II, III, IV, V
- B.II, III, IV, V, I
- C.III, IV, V, I, II
- D.IV, III, I. V, II
- E.III, IV, I,V, II
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Answer: E III, IV, I,V, II
- 15.Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336J\(g^{-1}\) . Specific heat capacity of water 4.2J\(g^{-1} K^{-1}]\)
- A.840J
- B.3360J
- C.3420J
- D.4200J
- E.7560J
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Answer: E 7560J
- 16.Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V.
- A.0.02 J
- B.0.10 J
- C.0.20 J
- D.1.00 J
- E.10.00 J
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Answer: E 10.00 J
- 17.Determine the value of x from the nuclear reaction below, \(^{222}_{86}Rn\) → \(^{x}_{88}Ra\) + 2β + energy
- A.220
- B.222
- C.224
- D.226
- E.228
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Answer: B 222
- 18.Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is
- A.conical
- B.cubical
- C.cylindrical
- D.parabolic
- E.spherical
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Answer: E spherical
- 19.In the electrical method of making a magnet, the polar the magnet formed depends on the
- A.amount of current passed
- B.direction of the current
- C.nature of the material used
- D.orientation of the magnetic material in space
- E.size of the magnetic material
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Answer: B direction of the current
- 20.In which of the following fields is repulsion NOT experienced?
- A.Electrical only
- B.Gravitational only
- C.Magnetic only
- D.Magnetic and electrical
- E.Magnetic and gravitational
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Answer: B Gravitational only
- 21.Inertia is the property of a body which makes the body to
- A.accelerate
- B.be reluctant to move when at rest
- C.experience friction when moving
- D.move randomly
- E.retard
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Answer: B be reluctant to move when at rest
- 22.The defect of the eye lens which occurs as a result of weak ciliary muscles is called
- A.astigmatism
- B.hypermetropia
- C.myopia
- D.presbyopia
- E.spherical aberration
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Answer: D presbyopia
- 23.The electric potential at a distance d from a point charge q in air of permittivity eo is expressed as?
- A.\(q ^{2} ÷ 4\)π\(e _{o} d\)
- B.\(q ^{2} ÷ 4\)π\(e _{o}\)
- C.q ÷ 4π\(e _{o} d ^{2}\)
- D.q ÷ 4π\(e _{o} d\)
- E.q ÷ 4π\(e _{o}\) ^{2} d
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Answer: D q ÷ 4π\(e _{o} d\)
- 24.The equation \(P^{x}V^{y}T^{z} =\) Constant is Charles' law if
- A.x = 0, y = 1 and z = -1
- B.x = 0, y = -1 and z = 1
- C.x = 1, y = 1 and z = 0
- D.x = 1, y = 1 and z = -1
- E.x = 1, y = 1 and z = 1
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Answer: A x = 0, y = 1 and z = -1
- 25.The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth's surface. If the weight of an object at X is 4.80N. what is its weight on the earth?
- A.1.92N
- B.2.88N
- C.6.72N
- D.8.00N
- E.12.00N
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Answer: E 12.00N
- 26.The phenomenon of photoelectric effect is used in the following EXCEPT
- A.automatic doors
- B.bugler alarm
- C.electric fire alarm
- D.sound production from film tracks
- E.television cameras
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Answer: D sound production from film tracks
- 27.The space between the two walls of a vacuum flask is completely evacuated to reduce heat loss by
- A.condensation
- B.conduction
- C.convection
- D.evaporation
- E.radiation
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Answer: C convection
- 28.The term torque means
- A.the equilibrant of two concurrent forces
- B.the moment of a force about an ads
- C.the resultant of several forces acting on a body in equilibrium
- D.two coplanar forces at right angle to each other
- E.two equal and opposite forces whose lines of action do not coincide
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Answer: B the moment of a force about an ads
- 29.The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.
- A.38.8 N\(m ^{-1}\)
- B.60.8 N\(m ^{-1}\)
- C.190.0 N\(m ^{-1}\)
- D.1900.0 N\(m ^{-1}\)
- E.3800.0 N\(m ^{-1}\)
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Answer: D 1900.0 N\(m ^{-1}\)
- 30.Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then
- A.A and B are equal
- B.A is greater than B
- C.the angle between A and B is 0°
- D.the angle between A and B is 90°
- E.the angle between A and B is 180°
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Answer: E the angle between A and B is 180°
- 31.Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is
- A.23.9°
- B.26.6°
- C.29.5°
- D.60.0°
- E.63.4°
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Answer: B 26.6°
- 32.Two images Y and X are formed by a plane mirror and a convex mirror respectively. Which of the following is correct about their characteristics?
- A.Both are inverted
- B.The magnification of Y is greater than one while that of X is one
- C.The magnification of Y is one while that of X is less than one
- D.Y is inverted while X is erect
- E.Y is real while X is virtual
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Answer: C The magnification of Y is one while that of X is less than one
- 33.When a resistor of resistance R is connected across a.c. the terminal p.d. of the cell is reduced to three-quarter its e.m.f. The cell's internal resistance in terms of R is
- A.\(\frac{R}{4}\)
- B.\(\frac{R}{3}\)
- C.\(\frac{R}{2}\)
- D.2 \(\frac{R}{3}\)
- E.R
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Answer: B \(\frac{R}{3}\)
- 34.Which of the following cells does not require a dipolar for effective and efficient delivery of current?
- A.Daniel cell
- B.Dry Leclanche cell
- C.Nickel-iron accumulator
- D.Voltaic cell
- E.Wet Leclanche cell
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Answer: B Dry Leclanche cell
- 35.Which of the following pairs of musical instruments produce sound due to the vibration of air column?
- A.Bell and piano
- B.Guitar and flute
- C.Trumpet and drum
- D.Trumpet and flute
- E.Violin and organ
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Answer: D Trumpet and flute
- 36.Which of the following pairs of phenomena helps in the resolution of the wave-particle paradox of matter?
- A.Compton effect and thermionic emission
- B.Electron diffraction and refraction
- C.emission and absorption of light
- D.Interference and polarization
- E.Reflection and photoelectric effect
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Answer: C emission and absorption of light
- 37.Which of the following phenomena is responsible for the spherical shape of soap bubbles?
- A.Adhesion
- B.Capillarity
- C.Cohesion
- D.Osmosis
- E.Surface tension
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Answer: E Surface tension
- 38.Which of the following statements about a gas is NOT correct?
- A.It has no definite shape
- B.It is compressible
- C.Its molecules are closely packed
- D.Its molecules gain kinetic energy when heated
- E.Its molecules move about randomly
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Answer: C Its molecules are closely packed
- 39.Which of the following statements about the pressure in a liquid is NOT correct? It
- A.acts in all direction
- B.changes with the material of the container
- C.is the same at all points in the same horizontal plane
- D.varies with the density of the liquid
- E.varies with the depth of the liquid
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Answer: B changes with the material of the container
- 40.Which of the following statements about water is NOT correct?
- A.Pure water freezes at 0°C under normal pressure
- B.The volume of a given mass of water at 0° is less than its volume at 4°C
- C.Water boils at a definite temperature
- D.Water evaporates at all temperatures
- E.Water has its maximum density at 4°C
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Answer: B The volume of a given mass of water at 0° is less than its volume at 4°C
- 41.Which of the following statements is correct about light and sound waves? Both
- A.are longitudinal waves
- B.are transverse waves
- C.have the same velocity in air
- D.need a medium for propagation
- E.transmit energy
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Answer: E transmit energy
- 42.Which of the following statements is correct about volatile liquids? They have
- A.low boiling point
- B.Low evaporating rate
- C.high conductivity
- D.high density
- E.high viscosity
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Answer: A low boiling point
- 43.Which of the following substances undergoes sublimation?
- A.Ether
- B.Ice
- C.Iodine
- D.Naphthalene
- E.Turpentine
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Answer: C Iodine
- 44.Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane?
- A.Random and rotational
- B.Rotational and oscillatory
- C.Rotational only
- D.Translations only
- E.Translational and rotational
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Answer: E Translational and rotational
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