What power is dissipated by the R 2=1.5 resistor in the figure(Figure 1) if R 1=

Question

What power is dissipated by the R2=1.5 resistor in the figure(Figure 1) if R1=3.0?

Part A

What power is dissipated by the R2=1.5 resistor in the figure(Figure 1) if R1=3.0?

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

0.2815W

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Figure 1 of 1

Part A

What power is dissipated by the R2=1.5 resistor in the figure(Figure 1) if R1=3.0?

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

0.2815W

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Incorrect; Try Again; 5 attempts remaining

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Figure 1 of 1

Explanation / Answer

The currents leaving V sum to zero:

(V-12)/3+ V/1.5+ (V+15)/3 = 0

= V(1/3+2/3+1/3) = 12/3-15/3

=V(4/3) = -1

= V = -3/4

Therefore the current in the 1.5 resistor = 0.75/1.5 = 0.5 A

and the power dissipated = I^2 * R = 0.375 W

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