2020
For steady layers of a Newtonian fluid at fixed temperature, which statement about the viscous force between the layers is not true? Compare one factor at a time, with the gap between layers unchanged.
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2020 WAEC SSCE Physics Past Questions
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2020
When two cells of negligible internal resistances and equal e.m.f. denoted by E\(_1\)and E\(_2\) are connected in parallel, combined e.m.f. E is given by
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2020
In the usual single-photon photoelectric experiment, keep the metal, illuminated area and frequency fixed, with the frequency above the threshold. The number of electrons emitted per second is proportional to the
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2020
The vacuum between the double walls of a thermos flask reduces heat loss through
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2020
Which of the following units is not fundamental?
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2020
A luminous object is one that
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2020
Which of the following actions would increase the electric force between two positively charged particles?
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2020
A diver steps off a diving platform that is 10m above the water. If there is no air resistance during the fall, there will be a decrease in the diver's
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2020
A pure crystalline solid is heated steadily from below its melting point at constant pressure. Which statements about its temperature are true?I. It remains steady until melting starts.II. It keeps rising until melting s…
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2020
An electron of mass \(9.1 \times 10^{-31}\) kg is travelling at a speed of \(2.0 \times 10^{6}\,\mathrm{m\,s^{-1}}\). Calculate the associated wavelength of the electron. [\(h = 6.6 \times 10^{-34}\,\mathrm{J\,s}\)]
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2020
A ray of light travels obliquely from a less dense medium to a denser medium. Which of the following statements is true about the light?
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2020
An a.c. generator can be converted to a d.c. electric motor by replacing the
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2020
Water waves have a wavelength of 3.6cm and speed of 18cms\(^{-1 }\) in deep water. If the waves enter shallow water with wavelength of 2.0cm, calculate the speed of the waves in the shallow water.
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2020
Which of the following statements correctly explains why a total solar eclipse would be seen by people on only a small portion of the earth's surface? The
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2020
In an electric circuit, an inductor of inductance 0.5 H and resistance 50\(\Omega\) is connected to an alternating current source of frequency 60 Hz. Calculate the impedance of the circuit.
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2020
In the hydraulic press, the force F applied is related to the diameter d of the cylinder by
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2020
The graph shows the heating of \(0.02\,\mathrm{kg}\) of a pure liquid at constant pressure. The liquid boils during the flat section at \(10^\circ\mathrm{C}\). For this sketch, take the heat readings at the ends of the f…
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2020
Which of the following statements about photoelectrons is correct?
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2020
An electron of mass m and charge e moves in a circular path in a magnetic field of flux density B. How long does it take to complete one orbit?
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2020
Which of the following statements about the motion of a simple pendulum is true?
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