A heater has a resistance of 400Q when the potential difference across it is 12V. If this same heater is connected in series to a circuit with a 98V supply and a resistor S, how much resistance should S have so that the potential difference on the heater is 12 V?

A heater has a resistance of 400Q when the potential difference across it is 12V. If this same heater is connected in series to a circuit with a 98V supply and a resistor S, how much resistance should S have so that the potential difference on the heater is 12 V?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 87CP: A resistor of an unknown resistance is placed in an insulated container filled with 0.75 kg of...

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Question

A heater has a resistance of 400Q when the potential difference across it is 12V. If this same heater is connected in series
to a circuit with a 98V supply and a resistor S, how much resistance should S have so that the potential difference on the
heater is 12 V?
a. 2867 Q
O b. 2467 Q
O c. 3267 e
O d. 3667 e

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