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Suppose you are using a multimeter (one designed to

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs ISBN: 9781938168000 42

Solution for problem 25CQ Chapter 21

College Physics | 1st Edition

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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

College Physics | 1st Edition

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Problem 25CQ

Suppose you are using a multimeter (one designed to measure a range of voltages, currents, and resistances) to measure current in a circuit and you inadvertently leave it in a voltmeter mode. What effect will the meter have on the circuit? What would happen if you were measuring voltage but accidentally put the meter in the ammeter mode?

Step-by-Step Solution:
Step 1 of 3

Solution 25CQ

(a)

If multimeter is in the voltmeter mode, its internal resistance R will be very high. Assume the resistance of circuit is RC. When this voltmeter is used in the circuit its equivalent resistance becomes very high.

 Rc = Rc + R

When this set-up is used to measure the current in the circuit, it will restrict the current flow to a high extent and thus the circuit will become current deficit and the correct reading for current could not be made.

(b)

If multimeter is in the ammeter mode, its internal resistance R will be very low.

If this setup is connected in parallel to the circuit, in order to measure the voltage in a segment of the circuit, because of low value equivalent resistor of the ammeter, a large amount of current is extracted by the multimeter, creating a high order voltage drop in the circuit beyond this point.

And hence reading of the voltage in the circuit is incorrect.

Step 2 of 3

Chapter 21, Problem 25CQ is Solved
Step 3 of 3

Textbook: College Physics
Edition: 1
Author: Paul Peter Urone, Roger Hinrichs
ISBN: 9781938168000

Since the solution to 25CQ from 21 chapter was answered, more than 274 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 25CQ from chapter: 21 was answered by , our top Physics solution expert on 07/07/17, 04:39PM. College Physics was written by and is associated to the ISBN: 9781938168000. The answer to “Suppose you are using a multimeter (one designed to measure a range of voltages, currents, and resistances) to measure current in a circuit and you inadvertently leave it in a voltmeter mode. What effect will the meter have on the circuit? What would happen if you were measuring voltage but accidentally put the meter in the ammeter mode?” is broken down into a number of easy to follow steps, and 58 words. This textbook survival guide was created for the textbook: College Physics , edition: 1. This full solution covers the following key subjects: meter, mode, Circuit, measure, accidentally. This expansive textbook survival guide covers 34 chapters, and 3125 solutions.

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Suppose you are using a multimeter (one designed to