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Physics-Magumu High School Question Paper

Physics-Magumu High School 

Course:Secondary Level

Institution: Mock question papers

Exam Year:2010



MAGUMU HIGH SECONDARY SCHOOL

TERM TWO

KCSE MOCK

DATE:6/7/2010

TIME:2HRS 30MIN

PHYSICS

INSTRUCTIONS:
1.All questions are compulsory.
2.Read and answer questions carefully.

Q.1.Define the term electric current and give its SI unit. (2 marks)
Q.2.An electric circuit consists of a lamp, a battery, an ammeter,a switch and connecting wires.Draw a circuit diagram containing these components. (5 marks)
Q.3.In a circuit, 20C of charge passes through a point in 5 s. What is the magnitude of the current? (5 marks)
Q.4.A current of 15 A passes through a starter of a car for 10 s.What quantity of charge flows through the starter? (5 marks)
Q.5.Give two examples of secondary cells.
(2 marks)
Q.6.Define the term 'potential difference' and 'terminal voltage'
(4 marks)
Q.7.State the factors that determine the amount of heat energy produced in a conductor when a current flows through it (5 marks)
Q.8.Calculate the resistance of each of the following appliances when used with a 240-volt supply.
a)A 60 w lamp (2marks)
b)A 1.0 KW iron(2 marks)
Q.9.An electric heater has three bars connected in parallel. Each bar is rated at 1KW.
Calculate the current that will flow through the heater when it is connected to a 240V mains supply. (5 marks)
Q.10.A 60-watt bulb is connected to a 240 V mains supply.How much energy is dissipated by the bulb in 10 minutes?
(2 marks)
Q.11.Explain why a fuse is always connected to the live wire in an electrical appliance.
(2 marks)
Q.12.An electric water heater rated at 3 KW is switched on for 6 hours. How many kilowatt-hours of electricity are used?
(5 marks)




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