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waec-physics-2020

6 followers

48 questions


Which of the following actions would increase the electric f...
which of the following actions would increase the electric force between two positively charged particles? A. Decreasing the mass of the particles
2 months ago 1 answer(s) 3 votes


A diver steps off a diving platform that is 10m above the wa...
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 driver's ...
2 months ago 1 answer(s) 2 votes


Which of the following statements about the process of melti...
Which of the following statements about the process of melting of a solid are true? The temperature of the solid will I. remain...
2 months ago 1 answer(s) 2 votes


An electron of mass 9.1 x 10-31kg is travelling at a speed o...
An electron of mass 9.1 x 10-31kg is travelling at a speed of 2.0 x 106ms-1. Calculate the associated wavelength of the elec...
2 months ago 2 answer(s) 4 votes


A ray of light travels obliquely from a less dense medium to...
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...
2 months ago 1 answer(s) 2 votes


An a.c. generator can be converted to a d.c. electric motor ...
An a.c. generator can be converted to a d.c. electric motor by replacing the A. slip rings with a split ring and connecting a battery B. spli...
2 months ago 1 answer(s) 2 votes


Water waves have a wavelength of 3.6cm and speed of 18cms-1 ...
Water waves have a wavelength of 3.6cm and speed of 18cms-1 in deep water. If the waves enter a shallow water with wavelength of 2.0cm, calculate ...
2 months ago 1 answer(s) 2 votes


Which of the following statements correctly explains wh...
which of the following statements correctly explains why a total solar eclipse would be seen by people on only small portion of the ear...
2 months ago 1 answer(s) 2 votes


In an electric circuit, an inductor of the inductance 0.5H a...
In an electric circuit, an inductor of the inductance 0.5H and resistance 50Ω is connected to an alternating current source of frequency 60Hz. Caluclat...
2 months ago 1 answer(s) 2 votes


In the hydraulic press, the force F applied is related to th...
In the hydraulic press, the force F applied is related to the diameter d of the cylinder by A. f ∝ d2 B. f ∝ d C...
2 months ago 1 answer(s) 2 votes