Chapter 22.1, Problem 23SSC

To determine

To Construct:A circuit with a battery, a voltmeter, an ammeter and the wire to be tested to make the measurement.

The way to measure the resistance of the wire.

Explanation of Solution

Introduction:

A device which measures the current in the circuit is an ammeter. A voltmeter is a device which measures the voltage difference across two points.

  

The battery is connected with the wire R and the ammeter A in series. The voltmeter V is connected across the wire R. The measurements are taken.

Resistance can be calculated using the Ohm’s law.

  $\begin{array}{l}V=IR\\ R=\frac{V}{I}\end{array}$

The voltage and the current is measured through the voltmeter and the ammeter. The resistance can be calculated by putting the measured values in the formula. Divide the voltage measured by the measured current to get the resistance of the wire.

Conclusion:

  

Measurements are made using this circuit and then the resistance is calculated using the Ohm’s law.