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Physics Past Questions and Answers

Waec Physics Questions

Question 1556:

Which of the following instruments is used to determine the accurate value of the electromotive force of a cell?

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A Voltmeter
B Meterbridge
C Voltameter
D Potentiometer

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Question 1557:

The capacitance of parallel plates capacitors varies

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A Inversely as the square of the distance between the plates
B Directly as the square of the distance between the plates
C Inversely as the distance between the plates
D Directly as the distance between the plate

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Question 1558:

Which of the following devices does not makes use of eddy current for its action? A/An

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A Galvanometer
B Speedometer
C Induction furnace
D Speedometer

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Question 1559:

A coil of inductance 0.12 H and resistance 4\(\Omega\), is connected across a 240V, 50Hz supply. Calculate the current through it. [\(\pi\) = 3.142]

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A 6.3A
B 33.3A
C 37.2A
D 40.0A

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Question 1560:

The work function of a metal is 2.56 x 10^-19J. Calculate the frequency of a photon whose energy is required to eject from the metal an electron with kinetic energy of 3.0ev. [1 eV = 1.6 x 10^-19J, h = 6.6 x 10^-34Js]

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A 5.56 x 10¹⁹Hz
B 1.66 x 10¹⁹Hz
C 1.12 x 10¹⁵Hz
D 8.42 x 10¹⁴Hz

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