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14 votes
14 votes
A 210 Ohm resistor uses 9.28 W of

power. How much current flows
through the resistor?
(Unit = A)

User Nrkn
by
3.3k points

1 Answer

17 votes
17 votes
  • Resistance=R=210Ohm
  • Power=9.28W=P

Current=I


\boxed{\sf P=I^2R}


\\ \sf\longmapsto I^2=(P)/(R)


\\ \sf\longmapsto I^2=(9.28)/(210)


\\ \sf\longmapsto I^2\approx0.04


\\ \sf\longmapsto I\approx√(0.04)


\\ \sf\longmapsto I\approx\sqrt{(4)/(100)}


\\ \sf\longmapsto I\approx(√(4))/(√(100))


\\ \sf\longmapsto I\approx(2)/(10)


\\ \sf\longmapsto I\approx0.2A

User Skabbes
by
3.2k points