Valero Mechanical Aptitude Practice Test

Which formula gives current?

I = V / R V = I * R R = V / I P = V * I

Correct Answer:

I = V / R

Explanation:

Current is the flow of electric charge, and Ohm's law ties together current, voltage, and resistance. The way to get current directly is to divide the voltage by the resistance: I = V / R. This form shows exactly how much current flows when you know the voltage across a component and its opposition to current. The other expressions describe different quantities: voltage is V = I × R, resistance is R = V / I, and power is P = V × I. They either refer to other quantities or would require rearranging to solve for current, whereas I = V / R gives current outright.

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