A variable resistor R is connected across the terminals of abattery. (Figure 1) shows the current in the circuit as R isvaried.FigureI (A)6+4.2-0+0102030-R (N)T401 of 1 >Part AWhat is the emf of the battery?Express your answer in volts to two significant figures.E =SubmitPart B15| ΑΣΦT =What is the internal resistance of the battery?Express your answer in ohms to two significant figures.Request AnswerΠΫΠΙ ΑΣΦSubmitProvide Feedback?Request Answer?VΩ

Resistance R is connected across the terminal of the battery.

Answered: A variable resistor R is connected…

A variable resistor R is connected across the terminals of a battery. (Figure 1) shows the current in the circuit as R is varied.

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

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Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

A variable resistor R is connected across the terminals of a
battery. (Figure 1) shows the current in the circuit as R is
varied.
Figure
I (A)
6+
4.
2-
0+
0
10
20
30
-R (N)
T
40
1 of 1 >
Part A
What is the emf of the battery?
Express your answer in volts to two significant figures.
E =
Submit
Part B
15| ΑΣΦ
T =
What is the internal resistance of the battery?
Express your answer in ohms to two significant figures.
Request Answer
ΠΫΠΙ ΑΣΦ
Submit
Provide Feedback
?
Request Answer
?
V
Ω

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