Concept explainers
To identify: The device represented by the given circuit.
Answer to Problem 64A
The device obtained by the given circuit is a voltmeter.
Explanation of Solution
Given:
A galvanometer with a resistor connected in series to it.
Consider the circuit shown in Figure 1. The circuit consists of a galvanometer which can be used to measure small currents. A resistor called multiplier is connected in series with the galvanometer and it is converted to a “voltmeter” using circuit.
Figure 1
In this circuit, the galvanometer measures the current through the resistor and this can be used to obtain the voltage across it using Ohm’s law as,
Hence, it works as a voltmeter.
Chapter 24 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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