K.C.S.E Physics Q & A - MODEL 2018PP2QN15
(a) Electrical energy is transmitted at very high voltages and low current
(i) Describe how the high voltages are attained
(ii) State two reasons why thick aluminum wires are preferred to Copper Wires for transmission Over long distances
(b) Figure 4 shows an electric cooker connected to the mains supply, X,Y and Z are the mains wires
State with a reason the name of wire Y.
(c) A student has some coloured bulbs rated 60 W, 240 V to be connected for decorations.
(i) State the number of such bulbs that can be connected normally to a 240V supply through a 5A fuse.
(ii) If the cost of electric energy is Ksh 3.00 per kWh, determine the cost of running the bulbs in (c) (i) for 5 hours daily for 20 days.
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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