set to R = 26.02. The switch S in the circuit now is closed. To what resistance must the variable resistor be set if bulb #1 is to have the same brightness after the switch is closed as it did with the switch open?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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For the circuit shown, all wires have no resistance, the battery has a constant internal resistance of r = 8.0
and the two light bulbs (#1 and #2) are identical, each with resistance Rbulb. The variable resistor is initially
set to R = 26.02. The switch S in the circuit now is closed. To what resistance must the variable resistor be
set if bulb #1 is to have the same brightness after the switch is closed as it did with the switch open?
9 Ohms
A.
B. 13 Ohms
C. 16 Ohms
D.
22 Ohms
E. This cannot be done
Vbat
Hill
W
R
#1
#2
Transcribed Image Text:For the circuit shown, all wires have no resistance, the battery has a constant internal resistance of r = 8.0 and the two light bulbs (#1 and #2) are identical, each with resistance Rbulb. The variable resistor is initially set to R = 26.02. The switch S in the circuit now is closed. To what resistance must the variable resistor be set if bulb #1 is to have the same brightness after the switch is closed as it did with the switch open? 9 Ohms A. B. 13 Ohms C. 16 Ohms D. 22 Ohms E. This cannot be done Vbat Hill W R #1 #2
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