# Rank circuits in order of current and net power output of battery

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Problem 1

A simple circuit consists of a resistor connected to a battery. The battery has emf (e), internal resistance (r), and terminal voltage (V_ab), and the resistor has resistance (R) .

Rank the following circuits in order of current, from highest to lowest values.

1. e = unknown 2. e = 1.4 V

r = 0.1 ohms r = 0.1 V

V_ab = 1.4 V V_ab = 1.2 V

R = 2.0 ohms R = unknown

3. e = 1.4 V 4. e = 1.4 V

r = 0.1 ohms r = 0.2 ohms

V_ab = unknown V_ab = unknown

R = 2.0 ohms R = 1.9 ohms

5. e = 1.4 V

r = unknown

V_ab = 1.2 V

R = 2.0 Ohms

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Problem 2

For this problem rank the 5 scenarios that were stated in the first problem. Rank the circuits in order of the net power output of the battery, from highest to lowest values.

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##### Solution Summary

The expert ranks circuits in order of current and net power output of batteries.

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