Question

Three resistors are connected in parallel as shown in the diagram below.

A voltage of 30.0 V is connected to three resistors, each 10.0 Ohms. There is an arrow pointing next to the third resistor.

Using the formula, what should be the reading of an ammeter placed at the point shown by the arrow?

Voltage = current × resistance


9.00 A


0.333 A


3.00 A


1.00 A

Answer 1

3.00 A

Each resistor in parallel has the full 30.0 V across it. By Ohm's law I = V/R = 30.0 V / 10.0 Ω = 3.00 A, so the ammeter in that branch reads 3.00 A.