2021
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.
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2021 WAEC SSCE Physics Past Questions
2021
Which of the following statements best describes the particles in a solid at room temperature? They are
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2021
A wire of cross-sectional area 2π *10\(^-{8}\)m\(2\) and resistivity 1.1 x 10\(^-{8}\)Ω m, has a resistance of 21Ω.Calculate the length of the wire. [π=22/7]
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2021
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.
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2021
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?
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2021
Which of the arrangements of radiations below shows decreasing order of wavelengths?
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2021
The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.
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2021
Which of the following curved surfaces will produce a real image? I. Concave mirror II. Convex mirror III. Diverging lens IV. Converging lens
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2021
Determine the speed of the wave.
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2021
The sketched graph 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.
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2021
Which of the following statements about the universal gravitational constant, G, is true?
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2021
(a) You are provided with a battery, an ammeter, a voltmeter, a resistance box, a key and connection wires.(i) Set up circuit as shown in the diagram above.(ii) With the key opened, measure and record the e.m.f. E\(_o\)…
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2021
In the actual exam, a setup will be provided, including a ray box, a converging lens, a lens holder, a screen, a meter rule, and a half-meter rule. The experiment involves determining the focal length of the lens by focu…
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2021
In the actual exam, a setup will be provided, where you'll use a set of masses, a meter rule, a thread, retort stands and clamps, a stopwatch, a knife-edge, and split corks to perform a physics experiment on oscillations…
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2021
(a)(i) State the principal factor that determines the relative stability of a radioactive nucleus.(ii) Arrange the following radioactive nucleus in decreasing order of stability. Justify your answer: X, Y and Z:\(^40{X}_…
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2021
(a)(i) What is meant by the root-mean-square value of an alternating current? (ii) Define impedance of an alternating current circuit.(b) An electrical device rated 120 V, 60 W is opened on a 240 V, 50Hz mains supply. Th…
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2021
(a)(i) Define each of the following terms as it relates to converging lenses (i) focal length; (ii) optical Centre.(iii) Draw a ray diagram to illustrate how a converging lens is used to produce a virtual image of an obj…
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2021
(a)(i) Define dew point. (ii) Explain why dew forms more quickly on the metal parts than on the rubber parts of a bicycle placed in the open overnight.(b)(i) Explain the statement. the specific heat capacity of copper is…
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2021
(a)(i) State Hooke's law. (ii) A spring has a length of 0.20 m when a mass of 0.30 kg hangs on it, and a length of 0.75 nm when a mass of 1.95 kg hangs on it. Calculate the: (i) force constant of the spring; (ii) length…
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2021
State three observable phenomena where a particle behaves like waves. State the scientific principle underlying the operation of fibre optics.(b) Explain each of the following terms as used in fibre optics: (i) core; (ii…
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