When a resistor is connected to a 12 V source, it draws a 185 mA current. The same resistor connected to a 90 V source draws a 1.25 A current. a) What is the resistance in both cases? R1 = _____ Ω R2 = _____ Ω b) Is the resistor ohmic? A - Yes. B - No.
When a resistor is connected to a 12 V source, it draws a 185 mA current. The same resistor connected to a 90 V source draws a 1.25 A current. a) What is the resistance in both cases? R1 = _____ Ω R2 = _____ Ω b) Is the resistor ohmic? A - Yes. B - No.
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 19PQ
Related questions
Question
When a resistor is connected to a 12 V source, it draws a 185 mA current. The same resistor connected to a 90 V source draws a 1.25 A current.
a) What is the resistance in both cases?
R1 = _____ Ω
R2 = _____ Ω
b) Is the resistor ohmic?
A - Yes.
B - No.
c) What is the rate of Joule heating in this resistor in both cases?
P1 = ____ W
P2 = ____ W
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