Calculate the diameter of a 2-cm length of tungsten filament in a small lightbulb if its resistance is 68 N. If 194mA current flows through the filament, find the potential difference across the source.

Calculate the diameter of a 2-cm length of tungsten filament in a small lightbulb if its resistance is 68 N. If 194mA current flows through the filament, find the potential difference across the source.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section21.2: Resistance And Ohm’s Law

Problem 21.3QQ: When does an incandescent lightbulb carry more current? (a) immediately after it is turned on and...

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Question

Calculate the diameter of a 2-cm length of
tungsten filament in a small lightbulb if its
resistance is 68 N. If 194MA current flows through
the filament, find the potential difference across
the source.
(a) the diameter of the wire (in m) =
(b) Potential difference across the source in V =

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