Electric currents, etc etc

  • Thread starter mark9159
  • Start date
  • #1
13
0
Hey,

I have a question to ask and was wondering if you guys could help me.

5.) A computer has a 300-W power supply. If household voltage is 120 V, how much current will flow through the computer?
A. 0.4 A
B. 2.5 A
C. 180 A
D. 420 A
E. 36,000 A

I picked B. I used the equation Electric power= current x voltage and changed it so current=power/voltage...which is how i got 2.5 A.

thanks,

mark
 

Answers and Replies

  • #2
2,209
1
Yup, P = IV, so I = P/V = 300/120 = 2.5
 

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