Equivalent resistance for resistors in parallel:
Equivalent resistance for resistors in series:
R2, R3, and R4 are in parallel:
1/R234 = 1/4.50 + 1/4.50 + 1/4.50 = 2/3
R234 = 1.50Ω
R1 and R234 are in series:
Req = R1234 = 4.50 + 1.50 = 6.00 Ω
In the circuit of Fig. E26.15, each resistor represents a light bulb. Let R1 = R2 = R3 = R4 = 4.50 Ω and E = 9.00 V.
(a) Find the current in each bulb.
(b) Find the power dissipated in each bulb. Which bulb or bulbs glow the brightest?
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