Part 1 In the figure below, a 85.4 V ideal battery is in a circuit with three id

Question

Part 1

In the figure below, a 85.4 V ideal battery is in a circuit with three identical bulbs with resistance 57.8

In the figure below, a 85.4 V ideal battery is in a circuit with three identical bulbs with resistance 57.8 italic capital omega. When the switch is open (as pictured), bulbs A and B are illuminated with equal brightness. When the switch is closed, Bulb C turns on too. With the switch closed, what is the power dissipated by Bulb C? Write your answer to three significant figures. What is the ratio of the power dissipated in Bulb A after the switch is closed to the power dissipated in Bulb A before the switch is closed? Write your answer to three significant figures. Your number should be greater than 1 if Bulb A gets brighter, less than 1 if it gets dimmer and equal to 1 if the brightness is unchanged. What is the ratio of the power dissipated in Bulb B after the switch is closed to the power dissipated in Bulb B before the switch is closed. Write your answer to three significant figures.

Explanation / Answer

1)power=(1/3*85.4)^2 / 57.8=14.02W

2)(2/3)^2/0.5^2=1.777

3)(1/3)^2/(1/2)^2=0.444

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