College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 18 - Basic Electric Circuits - Learning Path Questions and Exercises - Conceptual Questions - Page 652: 17

Answer

a) An ammeter has very low resistance. so if it were connected in parallel, the circuit current would be very high and its galvanometer could burn out. b) A voltmeter has very high resistance, so if it were connected in series in a circuit, it would read the voltage of the source as it has the highest resistance and thus the most voltage drop among the circuit elements. Th circuit current would drop close to zero.

Work Step by Step

a) An ammeter has very low resistance. so if it were connected in parallel, the circuit current would be very high and its galvanometer could burn out. b) A voltmeter has very high resistance, so if it were connected in series in a circuit, it would read the voltage of the source as it has the highest resistance and thus the most voltage drop among the circuit elements. Th circuit current would drop close to zero.
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