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Current and Voltage in pure series and parallel circuits

Problem

Towards the end of her physics laboratory exam, Fatima's voltmeter stops working, and the lab assistant is nowhere to be seen.
Help her find the voltage, V1, across R1 using Ohm's law.
V1=
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
V