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Finding currents and voltages (pure circuits)

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Problem

Two resistors, R1=48 Ω and R2=12 Ω, are connected in parallel across a cell of voltage, Vcell=24 V, as shown below.
What current, I1, flows through the 48 Ω resistor?
I1=
  • 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
A