2012
Which of the following radiations emitted in radioactive decay has momentum, a fairly high penetrating power and is deflected by a magnet?
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2012 WAEC SSCE Physics Past Questions
2012
Which of the following arrangements of radiations is in the order of decreasing penetrating power?
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2012
Which of the following statements about X-rays is correct? X-rays
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2012
A metal with a work function of 3.0ev is irradiated with ultraviolet light of energy 4.0 ev. The kinetic energy of the ejected electron is
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2012
An atom in an excited state is one whose
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2012
An object is placed 20cm from a concave mirror of focal length 15cm. Calculate the linear magnification of the image formed
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2012
A ball is projected horizontally from the top of a hill with a velocity of 20m-1. If it reaches the ground 4 seconds later, what is the height of the hill? (g = 10ms-2)
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2012
In the actual exam, a setup will be provided, where you'll use a potentiometer, an ammeter, a voltmeter, a standard resistor, and other necessary apparatus to perform an experiment as per the circuit diagram provided. Th…
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2012
In the actual exam, a setup will be provided, including a syringe, a petri-dish attached to the base of the movable piston of the syringe, a set of weights, and other necessary apparatus. The experiment involves clamping…
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2012
Study the diagrams above and use them as guides in carrying out the following instructions.Using the spring balance provided, determine the weight of the object of mass M= 50.0g in air. Record this weight as W\(_{1}\).De…
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2012
A spiral spring with a metal extends by 10.5 cm in air. When the metal is fully submerged in water, the spring extends by 6.8 cm. Calculate the relative density of the metal. (Assume Hooke's law is obeyed)
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2012
(a) (i) Explain why x-rays can be used to produce photographs of fractures in bones.(ii) List four uses of x-rays other than in medicine.(b) State the energy transformations which takes place during the operation of an…
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2012
(a) Define magnetic line of force.(b) A wire of length 10 cm carrying a current of 4.0 A is placed between the poles of a powerful electromagnet of magnetic flux density 2.0 T. Calculate the:(i) force on the wire when it…
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2012
(a) Explain the term critical angle.(b) List two factors which determine the deviation of a ray of light by a triangular glass prism.(c) The angle of refraction (r) of a ray of white light from air through a triangular g…
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2012
(a) (i) What is a machine?(ii) State two uses of gears.(iii) Define the velocity ratio for a pair of gear wheels.(iv) How can the mechanical advantage of a gear system be increased? The diagram above illustrates the gea…
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2012
(a) State the principle of conservation of linear momentum.(b) Explain the mode of action of a propelled rocket.(c) During a training session, two footballers pass a ball repeatedly between themselves. Give two reasons w…
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2012
(a) Explain wave-particle duality of light.(b) Illustrate your answer in (a) with observable phenomena.
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2012
The diagram above illustrates an arrangement of a cathode ray from an electron gun and a bar magnet placed perpendicularly to the direction of the ray. Will the ray bend downward or upward? Explain.
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2012
(a) On what principle does lighting in a fluorescent tube operate?(b) State two factors which determine the colour of light produced in a fluorescent tube.
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2012
Explain why it is desirable to install an air conditioner near the ceiling of a room and not close to the floor.
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