114th Problem 2016

Electricity and Magnetism Level 1

Given the parallel circuit above with the following values:

R 1 = 100 Ω R 2 = 300 Ω R 3 = 600 Ω V T = 150 V { R }_{ 1 }=100\Omega \\ \\ { R }_{ 2 }=300\Omega \\ \\ { R }_{ 3 }=600\Omega \\ \\ { V }_{ T }=150V

Find the I 1 { I }_{ 1 } or (current of R 1 { R }_{ 1 } ) of the circuit.

Part One .

Check out the set: 2016 Problems .
This is part two of the problem.


The answer is 1.5.

Angela Fajardo by Angela Fajardo , 19, Philippines

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1 solution

Tom Engelsman
Jul 15, 2016

All three resistors are in parallel with the same voltage source, which implies they are each at the same potential of 150V. By Ohm's Law, the current I1 is just I1 = 150V / R1 = 150/100 = 1.5A.

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