The LED requires a minimum current of 20.0 mA to light. Assuming that your battery is operating at 9.00 V, what would the resistance be if the LED just begins to light up when brought into contact with the end of your carbon resistor

The LED requires a minimum current of 20.0 mA to light. Assuming that your battery is operating at 9.00 V, what would the resistance be if the LED just begins to light up when brought into contact with the end of your carbon resistor

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 17CQ: Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a...

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

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