   Chapter 18, Problem 3P

Chapter
Section
Textbook Problem

A battery with an emf of 12.0 V has a terminal voltage of 11.5 V when the current is 3.00 A (a) Calculate the battery’s internal resistance r. (b) Find the load resistance R.

(a)

To determine
The battery’s internal resistance.

Explanation

Given Info: The emf of the battery is 12.0 V, terminal potential difference is 11.5 V, and current through the circuit is 3.00 A.

Explanation:

The terminal potential difference is related with the emf and internal resistance of the

Battery is,

ΔV=εIr

• I is the current through the circuit,
• ΔV is the potential difference across the battery,
• ε is the emf of the battery,
• r is the internal resistance of the battery,

Rewrite the above relation in terms of internal resistance.

Ir=ΔVεIr=εΔVr=εΔVI

Substitute 12

(b)

To determine
The load resistance of the battery.

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts 