Solution :
a)All three resistors are in series so there equivalent resistance is
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b)
Total current in circuit is given by
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c)
All resistors are in series so all have same current through them = I = 2 A.
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d)
Voltage drop across each can be found using ohm's law
1.Across R1 = V1 = I R1 = 2 8 = 16 V
2..Across R2 = V2 = I R2 = 2 10 = 20 V
3..Across R3 = V3 = I R3 = 2 2 = 4 V
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e)
Power (P) used by each can be calculated using , P = VI
For R1 , P1 = V1I = 16 2 = 32 W
For R2 , P2 = V2I = 20 2 = 40 W
For R3 , P3 = V3I = 4 2 = 8 W
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