Parallel Circuits

What is the total power of the circuit?

A 2.2 W

B 4.2 W

C 6.2 W

D 8.2 W

ANS:A - 2.2 W

1/Rt=1/R1+1/R2+1/R3.
1/Rt=1/1+1/2+1/3,
1/Rt=1+0.5+0.33,
1/Rt=1.83,
Rt=1/1.83,
Rt=0.546K ohm.

I=V/R.
I=48/.546,
I=88mA.

P=VxI.
P=48x.088A,
P=4.224W.

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