The 10? resistor in the figure (Figure 1) is dissipating80W of power. Part A How

Question

The 10? resistor in the figure (Figure 1) is dissipating80W of power.

Part A

How much power is the 5? resistor dissipating?

Express your answer to two significant figures and include the appropriate units.

Part B

How much power is the 20? resistor dissipating?

Express your answer to two significant figures and include the appropriate units.

P = The 10? resistor in the figure (Figure 1) is dissipating80W of power. Part A How much power is the 5? resistor dissipating? Express your answer to two significant figures and include the appropriate units. P = Part B How much power is the 20? resistor dissipating? Express your answer to two significant figures and include the appropriate units. P =

Explanation / Answer

given,
P ( in 10 ohm) = I^2 * 10 =80 ,
so
I^2 = 8 ,
so ,
P( in 5 ohm) = 8*5 = 40 W

now total power dissipated in this branch = 40+80= 120 W ,

so ,
V^2 /( 10+5) = 120 ,
so ,
V^2 = 1800
now, same voltage is in other branch ,
so ,
P( in 20 ohm) = V^2/20 = 1800/20 = 90 W

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