Question

5) It is known that when a heavy appliance comes on, lights that are connected to the same circuit will dim. Consider the case of a motor in a refrigerator that is in parallel to a bulb. a) Given the voltage source is 120 V, the wire resistance is 0.400 Ω, and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 30.0 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance. b) What is the power consumed by the motor?

          5)         It is known that
when a heavy appliance comes on, lights that are connected to the
same circuit will dim.  Consider the case of a motor in a
refrigerator that is in parallel to a bulb.
a)         Given the
voltage source is 120 V, the wire resistance is 0.400 Ω, and the
bulb is nominally 75.0 W, what power will the bulb dissipate if a
total of 30.0 A passes through the wires when the motor comes
on?  Assume negligible change in bulb resistance.
b)         What is the power consumed
by the motor?

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Added by Betty S.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

05/02/2023

Step 1

We can use the formula: $P = \frac{V^2}{R}$ Where P is the power, V is the voltage, and R is the resistance. We can rearrange the formula to find the resistance: $R = \frac{V^2}{P}$ Now, we can plug in the values for the bulb: $R_{bulb} = Show more…

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5) It is known that when a heavy appliance comes on, lights that are connected to the same circuit will dim. Consider the case of a motor in a refrigerator that is in parallel to a bulb. a) Given the voltage source is 120 V, the wire resistance is 0.400 Ω, and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 30.0 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance. b) What is the power consumed by the motor?

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