Recent questions in Physics Form 4

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The figure below shows an induction coil used to step-up voltage.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Arrange the following electromagnetic waves in order of their increasing wavelength. X-rays, gamma rays, ultra violet, visible light, infrared and microwaves.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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What is biasing?

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Using a diagram, explain how doping produces a p-type semi-conductor.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The figure below shows features of a diffusion cloud chamber used for detecting radiations from a radioactive source.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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A radioactive isotope showed a count rate of 82 counts per second initially. After a time of 210 seconds, the count rate dropped to 19 counts per second. The average background countremained constant at 10 counts per second. What is the half-life of the material?

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Explain why Carbon -14(614C) is radioactive while Carbon – 12 (612C) is not.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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State any two factors that affect photoelectric effect.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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What is meant by the term ‘photoelectric effect?’

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The following is a decay series of Uranium 238.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Using the band theory, differentiate between conductor and a semi-conductor .

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The figure below shows a circuit diagram for a photocell.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The diagram below shows an electrical appliance connected to the mains.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Differentiate between nuclear fission and nuclear fusion as used in the study of physics.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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A stone of mass 4.0kg immersed in water and suspended from a spring balance with a string. The beaker was placed on a compression balance whose reading was 85N. The density of the stone was 3000kg/m-3while the density of the liquid was 800kg/m-3. Determine the;

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The figure 4 below shows an object of mass 0.2kg whirled in vertical circle of radius 0.5m at uniform speed of 5m/s.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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How much current is taken by a bulb whose rate is 100Ω and which is designed for mains supply of 240V?

asked Aug 18, 2021 in Physics Form 4 by anonymous

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3 answers

State the Archimedes principle.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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A stone is tied to a string and whirled in a horizontal circle at a constant speed. In which direction is the stone being accelerated at each point of its path?

asked Aug 5, 2021 in Physics Form 4 by anony mous

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When a piece of metal is place in water it sinks. But when the same piece of metal is placed on a block of wood it floats explain the observation

asked Aug 5, 2021 in Physics Form 4 by anony mous

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