science math question

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Electric current is the net movement of electric charge in a single direction. A voltage difference is related to the force that causes charge to flow. Ohm’s Law can be expressed mathematically,  R = V / I.  Calculate the voltage difference in a circuit with a Resistance of 25 Ohms if the current in the circuit is 0.5 A?   SHOW ALL WORK

May 12th, 2015

Resistance =  Voltage / current, that is R = V/ I.

Since we need voltage, make V the subject of the above equation  by multiply by I on the both sides:

I x R = V/I x I

V = IR

I = 0.5

R = 25 Ohms

So the voltage difference  = 0.5 x 25 = 12.5 V

Hope this helps! Please best me if it does or ask questions if you are not satisfied!


May 12th, 2015

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May 12th, 2015

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