3.2 Circuit A2 R = 100 E= 12 V R- 40 R,= 50 Figure 5:
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A 12V battery is connected to a parallel combination of a 4Ω, 5Ω, 10Ω resistor as shown. Two ammeters, a voltmeter and two switches are included in the circuit. Both switches are initially closed. calculate
1. The total resistance on the circuit.
2. values for; ammeter A1, ammeter A2 and Voltmeter
3. the rate of energy dissipaton in the 5Ω resistor.
4. the amount of charge which flows through ammeter A1 in one minute

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3.1 power
Every day a certain household uses a 4.4 KW electric stove for 70 minutes, seven 150 W light bulbs for 7
hours each and miscellaneous appliances amounting to 1.8 KW/h. The 4 KW hot water cylinder switches
on for a total of 120 minutes during the day. If electricity cost 50c a KW/h, what is the monthly electricity
bill. (5 marks)
3.2 Circuit
s1
R = 100
E = 12 V
R= 42
R, = 50
S2
Figure 5:
A 12V battery is connected to a parallel combination of a 42, 52, 102 resistor as shown. Two amme-
Assignment No 5
Page 4/5
ters, a voltmeter and two switches are included in the circuit. Both switches are initially closed. calculate
05:43 PM
18/11/2020
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