Chapter 24, Problem 1ASA

To determine

The reason for which the resistance is given by $R=V/I$.

Answer to Problem 1ASA

The resistance of a circuit is the ratio between the voltage measured by the voltmeter and the current measured by the ammeter. So the resistance is given by $R=V/I$.

Explanation of Solution

The potential difference through an electric circuit is measured by using the voltmeter and the amount of flow of current through the circuit is measured by using the ammeter. The ammeter-voltmeter method is used to measure the resistance of the circuit.

Conclusion:

The Ohm’s law is used to measure, current, voltage, and resistance of a circuit if either two of them are given.

Write the expression for Ohm’s law.

    $I=\frac{V}{R}$

Here, $I$ is the current, $V$ is the voltage, $R$ is the resistance.

Rearrange the above expression for $R$.

    $R=\frac{V}{I}$