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The figure below shows an experimental set up in a vacuum for investigating the effect of a magnetic field on the radiation emitted by a radio-active source.
The background radiation at the place is 5 counts per minute. The detectors are placed a positions A, B and C respectively. Results obtained are shown in the table below.
Use the table to explain which of the three types of radiations are emitted from the source.
Date posted:
September 27, 2019
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Study the figure below and use it to answer questions that follow.
(i) Briefly explain how the circuit works to produce a rectified alternating current.
(ii) Draw on the diagram to show the position of the capacitor.
(iii) State the functions of the capacitor in the circuit.
(iv) Sketch the graph of the output as seen on a CRO screen.
Date posted:
September 27, 2019
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Define the term acceptor atoms as applied in semiconductor.
Date posted:
September 27, 2019
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Sketch a circuit diagram that can be used to investigate p-n junction diode characteristics.
Date posted:
September 27, 2019
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State the meaning of the statement diode characteristic curve.
Date posted:
September 27, 2019
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Highlight two types of job opportunities available in the field of computer hardware
Date posted:
September 27, 2019
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The figure below shows an experimental arrangement. S1 and S2 are narrow slits.
State what is observed on the screen when the source is:
(i) Monochromatic
(ii) White light
Date posted:
September 27, 2019
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Name three duties that are carried out by a web administrator.
Date posted:
September 27, 2019
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Convert 7.12510 to its binary equivalent.
Date posted:
September 27, 2019
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Using dots(•) and crosses(x), show bonding in magnesium chloride.
Date posted:
September 27, 2019
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With an aid of a pseudo code and flow chart, write a computer program that can be used to compare the values of two numbers and print the largest number.
Date posted:
September 27, 2019
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Outline the services rendered by producer cooperative societies to their members.
Date posted:
September 27, 2019
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One stage of system development is system testing. Outline the advantages of this stage before implementation.
Date posted:
September 27, 2019
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An observer watching a fireworks displays sees the light from an explosion and hears the sound 4 seconds later. How far was the explosion from the observer? (Speed of sound in air 330m/s).
Date posted:
September 27, 2019
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The most popular type of electronic data storage currently is magnetic disk storage such as hard disk or Winchester disk. Give reason as to why they are popular.
Date posted:
September 27, 2019
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State the securities traded at the Nairobi stock exchange market.
Date posted:
September 27, 2019
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Explain briefly how Electronic Funds Transfer (EFT) and Electronic Point of Sale (EPOS) is used to facilitate business in Nakumatt supermarkets in Kenya.
Date posted:
September 27, 2019
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A block of mass 200g is placed on a frictionless rotating table while fixed to the centre of the table by a thin thread. The distance from the centre of the table to the block is 15cm. If the maximum tension the thread can withstand is 5.6N, determine the maximum angular velocity the table can attain before the thread cuts.
Date posted:
September 27, 2019
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List the activities found in primary level production.
Date posted:
September 27, 2019
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In a war torn countries such as Somalia, explosives that get buried under ground requires removal in order to provide safety for the people.
(a) Name a computer controlled device that would be used safely for detecting such explosives
(b) Explain why you recommend the use of such a device in (a) above
Date posted:
September 27, 2019
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The figure below shows a metal rod AB of length 2m horizontally balanced while supported by a pivot and a string.
Determine the mass of the metal rod if the tension is 15N.
Date posted:
September 27, 2019
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A block of wood of mass 80kg floats in water with 0.6 of its volume in water. Calculate the number of rods each 20g that can be placed on the block so that its top is level with the surface of water.
Date posted:
September 27, 2019
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Give the limitations of debentures as a source of capital for a company.
Date posted:
September 27, 2019
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A computer operator in your school wanted to print a document but the printer could not print yet the online light is on and the printer paper is correctly placed. Give the other possible reasons why the printing process failed.
Date posted:
September 27, 2019
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State the Precautions that a drawer can take in order to ensure that his cheques do not bounce.
Date posted:
September 27, 2019
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Draw a diagram to illustrate the following:
(a) USB Port.
(b) Serial Port.
(c) Parallel Port.
Date posted:
September 27, 2019
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Calculate the total power in lifting 0.2kg of metal cane containing 2000cm3 of ice onto a lorry as shown below within 4s. (SI Q = 0.9g/cm3)
Date posted:
September 27, 2019
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List the ways in which the use of containers is sea transport enhances security of cargo.
Date posted:
September 27, 2019
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The figure below shows four equivalent springs with negligible weight, the weight of the rod R is 20N. Given that the spring constant is 5N/m. Calculate the load L which causes an extension of 28m to the system.
Date posted:
September 27, 2019
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State any two possible ways of increasing velocity ratio of wheel and axle.
Date posted:
September 27, 2019