Calculate the diameter of a 0.027-cm length of tungsten filament in a small lightbulb if its resistance is 4 Q. If 34mA 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 =

Calculate the diameter of a 0.027-cm length of tungsten filament in a small lightbulb if its resistance is 4 Q. If 34mA 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 =

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter7: Electricity

Section: Chapter Questions

Problem 18Q: (Indicates a review question, which means it requires only a basic understanding of the material to...

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Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

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In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

Calculate the diameter of a 0.027-cm length
of tungsten filament in a small lightbulb if
its resistance is 4 Q. If 34mA 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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