Nailing Challenging Secondary School Physics

By: Rajiv Misra
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In the diagram, V1 = 10 V, I = 2A and R1 = 2Ω. What is the value of V2 and V3?

Topic: Electricity

Key Formula : V = IR

                          V1 = V2+V3

Answer:

V2 = IR1 = (2)(2) = 4V

V1 = V2+V3

10 = 4 + V3

V3 = 10 – 4 = 6 V

Tip: In a series circuit, the voltage of the battery, EMF, is the sum of the potential difference of the resistors. This produces the equation:  V1 = V2+V3 .

 

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Posted on 17/04/2017

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