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4. What current is drawn by a 90 W light bulb on a 110 V household circuit?
Using GRASS method
answer for 100 points


Sagot :

  • V=110V
  • P=90W

We know

  • P=VI

current is I

  • 90=110I
  • 9=11I
  • I=9/11
  • I=0.82A

Formula is

[tex]\boxed{\sf I=\dfrac{P}{V}}[/tex]

  • I denotes to current
  • P denotes to power
  • V denotes to Voltage

So

[tex]\\ \tt{:}\longrightarrow I=\dfrac{90}{110}[/tex]

[tex]\\ \tt{:}\longrightarrow I=0.82A[/tex]