Chapter 22.1, Problem 9PP

To determine

To draw: An electrical circuit with given specifications.

Answer to Problem 9PP

An electrical series circuit with given specifications is shown in Figure 1.

Explanation of Solution

Given:

Voltage of the battery, $V=4.5\text{V}$

Ammeter reading, $I=85\text{mA}$

Formula used:

According to Ohm’s law, the voltage-current relationship is

  $V=IR$

Calculation:

Series Circuit:

A circuit in which one or more resistors are connected one by one in a chain making a single path is a series circuit.

The current through all the resistors is same and the total voltage is distributed to all the resistors.

The series circuit for the given specification is,

  

Figure 1

The direction of conventional current is from positive to negative terminal outside the battery and negative to positive terminal inside the battery.

The value of resistor is,

  $R=\frac{V}{I}=\frac{4.5}{85\times {10}^{-3}}=53\Omega$