# A neophyte mechanic foolishly connects an ammeter with 0.45 ohm resistance directly across a 12 V...

## Question:

A neophyte mechanic foolishly connects an ammeter with {eq}0.45 \ \Omega {/eq} resistance directly across a 12 V car battery whose internal resistance is {eq}0.01 \ \Omega {/eq}. What is the power dissipation in the meter?

## Electrical Power:

Electrical power is how much electrical energy is used per unit time. Power is measured in watts and is given the symbol W. The lower the resistance in a circuit the higher the power rating in a resistor in that circuit.

## Answer and Explanation:

The power dissipated by the ammeter is 313 W.

First we need to determine the equivalent resistance of the battery which is in series with the...

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from CLEP Natural Sciences: Study Guide & Test Prep

Chapter 6 / Lesson 9