Recent questions in Physics Form 4

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why blackened bulb can be used to detent infra-red radiation

asked Apr 27 in Physics Form 4 by 0745237XXX

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an astronaut in orbit round the earth may feel weightless even when the earth's gravitational field still acts on him.Explain

asked Apr 26 in Physics Form 4 by 0778746XXX

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what is Eddy current

asked Apr 30, 2022 in Physics Form 4 by illusionchatnoir

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draw diagram to show how the eye of a person sees the image

asked Apr 26, 2022 in Physics Form 4 by Freddykabaria

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Why is the moon said to be accelerating when revolving round the earth at a Constant speed?

asked Apr 4, 2022 in Physics Form 4 by JosleoND

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Differences between CRT and CRO

asked Mar 23, 2022 in Physics Form 4 by Lukulu

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distinguish between linear velocity and angular velocity

asked Mar 5, 2022 in Physics Form 4 by boazk

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how to measure the quantity of ×-rays

asked Feb 8, 2022 in Physics Form 4 by dogolemo

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Define nuclear fission

asked Nov 18, 2021 in Physics Form 4 by Fidels

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a girl whirls a stone of mass 0.5kg in a vertical circle on the end of a string 40cm long.at the lowest point of the circle of the circle, the velocity of the stone is 3m/s.calculate the tension on the string at this point?

asked Oct 7, 2021 in Physics Form 4 by salmonkajua

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In a certain x-ray tube, the electrons are accelerated by a pd of 12000V. Assuming all the energy goes to produce x-rays, determine the frequency of the x-rays produced. (Planks constant h = 6.62 ×10-34 J and charge of an electron, e = 1.6 ×10-19 C)

asked Aug 18, 2021 in Physics Form 4 by anonymous

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What property of lead makes it suitable for use as shielding material?

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Figure 4 shows the features of an x-rays tube.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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2 answers

X-rays are used for detecting cracks inside metal beams.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The function of the capacitor is to eliminate sparking at the contacts. State why sparking occurs at the contacts.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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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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