The potential difference across a cell on open circuit / work needed to move a unit charge round a closed loop.
joseph rimiru answered the question on January 7, 2018 at 17:58
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Date posted: January 7, 2018. Answers (1)
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Date posted: January 7, 2018. Answers (1)
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Date posted: January 7, 2018. Answers (1)
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Date posted: January 7, 2018. Answers (1)
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Date posted: January 7, 2018. Answers (1)
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Water flows along a horizontal pipe of cross-section area 35^2 cm and constriction of cross section 5^2 cm . if the speed of water at the construction is 2 m/s
Calculate:
i)Continuity constant in SI unit
ii) the speed in the wide section
Date posted: January 7, 2018. Answers (1)
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Date posted: January 7, 2018. Answers (1)
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Date posted: January 6, 2018. Answers (1)
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Date posted: January 6, 2018. Answers (1)
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(i) State the reason why a lamp is made of tungsten.
(ii) Why is the bulb of such a lamp filled with an active gas?
Date posted: January 6, 2018. Answers (1)
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A hockey player trains on a nylon fiber surface. As he runs around, his shoes rub against the surface and he becomes positively charged.
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Date posted: January 6, 2018. Answers (1)
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State the advantages of solid state devices over vacuum tubes.
Date posted: January 6, 2018. Answers (1)
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(a) What is diffusion?
(b) A smoke cell contains a mixture of trapped air and smoke. The cell is brightly lit and viewed through a microscope. State and explain what is observed.
(c) A beaker is filled completely with water. A spoon full of common salt is added slowly. The salt dissolves and the water does not overflow.
(i) Why is salt added slowly?
(ii) Why doesn't the water overflow?
Date posted: January 5, 2018. Answers (1)
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A stream of air passing over a roof of room at higher velocity than the velocity of air inside the room is likely to blow off the roof. Give a reason for this
Date posted: January 5, 2018. Answers (1)
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Date posted: January 3, 2018. Answers (1)
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Date posted: January 3, 2018. Answers (1)
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Date posted: January 3, 2018. Answers (1)
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Determine the cost of using an electric heater rated 3kW for 12 hours given that the cost of electricity per kilowatt-hour is Sh. 8.00.
Date posted: January 3, 2018. Answers (1)
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State and explain the effect of increasing the extra high tension E.H.T in an x-ray tube on the x-rays.
Date posted: January 3, 2018. Answers (1)
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A metal iron has work function of 6.8 x 10^-19J. Calculate the minimum frequency of light that can cause photoelectric emission. (Take h = 6.63 x 10^-34 Js)
Date posted: January 2, 2018. Answers (1)