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If a cell supplies a current of 0.5 A when it's emf is 2 V and internal resistance is 1 ohm...

Question:

If a cell supplies a current of 0.5 A when it's emf is 2 V and internal resistance is 1 ohm calculate it's external resistance

a). 0.5 ohms

b). 1 ohms

c). 2 ohms

d). 2.5 ohms

e). 3 ohms

Internal Resistance of the Battery:

An ideal battery the voltage is independent of the load and the current flowing through it, therefore provides a constant voltage, this is because it has an internal resistance is equal to zero, thereby achieving that all voltage falls directly into the load. A real battery differs from the ideal because it always has a small internal resistance that affects the current, thus influencing the potential drop of the load.

Answer and Explanation: 1

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{eq}\eqalign{ & {\text{We have }}\,\,{R_i}{\text{ = 1}}\,\Omega \,{\text{ (internal resistance)}}{\text{,}}\,\,I = 0.5\,A\,{\text{ and }}\,E =...

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Voltage Sources: Energy Conversion and Examples

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Chapter 6 / Lesson 6
21K

Electrons are motivated to power circuits through voltage sources, which can be clearly seen in batteries and other everyday items. Generators can come in the form of nuclear, coal, natural gas, hydroelectric, and wind power to generate voltage. In this lesson, learn about energy conversion, voltage, voltage sources, and examples of these things in everyday life, including batteries and generators.


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