In the circuit A, B, C, and D are identical light bulbs. Assume that the battery
ID: 2138536 • Letter: I
Question
In the circuit A, B, C, and D are identical light bulbs. Assume that the battery maintains a constant potential difference between its terminals (i.e., the internal resistance of the battery is assumed to be negligible) and the resistance of each lightbulb remains constant.
A. If the emf of the battery is 17 V and each resistance is 4? what power is consumed by the bulb B? Answer in units of W.
In the circuit A, B, C, and D are identical light bulbs. Assume that the battery maintains a constant potential difference between its terminals (i.e., the internal resistance of the battery is assumed to be negligible) and the resistance of each lightbulb remains constant. If the emf of the battery is 17 V and each resistance is 4? what power is consumed by the bulb B? Answer in units of W.Explanation / Answer
b,c series
d parallel to b,c
a series to the above resultant
R resultant = 20/3 = 6.667
I total = 17/6.667 = 2.55 amp
Ib = I(4/(4+8)) = 0.334I =0.334*2.55 = 0.8517
POWER b = (Ib^2)Rb = (0.8517^2)*4 = 2.901 W
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