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Sound travels at different speeds in solids, liquids and gases. State one factor that affect the speed of sound in a solid.
Date posted:
October 5, 2017
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How are eddy currents in the transformer minimized?
Date posted:
October 5, 2017
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state two conditions under which current flows in the circuit.
Date posted:
October 5, 2017
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State the SI unit of luminous intensity.
Date posted:
October 5, 2017
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What is doping of a semiconductor.
Date posted:
October 5, 2017
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State three similarities between the eye and the camera.
Date posted:
October 5, 2017
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What is meant by amalgamation in simple cells.
Date posted:
October 5, 2017
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State three reasons why it is advisable to make a periscope using prisms instead of plane mirrors.
Date posted:
October 5, 2017
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State what happens to the size of the the image if the pin hole camera is moved away from the Object.
Date posted:
October 5, 2017
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Give a reason why the grid in a cathode ray oscilloscope is biased negatively.
Date posted:
October 5, 2017
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State two uses of radioactivity in hospitals.
Date posted:
October 5, 2017
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Silicon was dipped with boron to form an extrinsic semi-conductor. What are the majority charge carriers in it.
Date posted:
October 5, 2017
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State two functions of a gold leaf electroscope.
Date posted:
October 5, 2017
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Explain why the leaf of a positively charged electroscope falls when a candle flame is brought near its cap.
Date posted:
October 5, 2017
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State four possible sources of background radiation.
Date posted:
October 5, 2017
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Explain what is meant by background radiation.
Date posted:
October 5, 2017
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State two applications of moments.
Date posted:
October 5, 2017
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Explain how wavelength varies with depth of water in a tank of variable length.
Date posted:
October 5, 2017
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A tungsten filament lamp contains Argon gas at low pressure. Why is air not used?
Date posted:
October 5, 2017
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What is the difference between P-type and N-type semiconductors.
Date posted:
October 5, 2017
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A scout blew a trumpet some distance from a wall, and heard its echo after 3.6 seconds later. How far is the wall from the scout? (speed of sound in air is 330 m/s)
Date posted:
October 4, 2017
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Name one form of energy other than heat produced by a red-hot electric element.
Date posted:
October 4, 2017
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What is kilowatt hour?
Date posted:
October 4, 2017
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State one property of electromagnetic waves.
Date posted:
October 4, 2017
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State the condition under which a converging lens is used as a magnifying glass.
Date posted:
October 4, 2017
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State two ways of increasing the size of the image in a pinhole camera.
Date posted:
October 4, 2017
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State the type of wave produced when a wire fixed at both ends is jerked.
Date posted:
October 4, 2017
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State one condition required for electromagnetic induction to occur.
Date posted:
October 4, 2017
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State one advantage of fitting wide tyres on a vehicle that moves on murram roads.
Date posted:
October 4, 2017
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State two applications of friction force.
Date posted:
October 4, 2017