Electronics - Parallel Circuits - Discussion

Discussion Forum : Parallel Circuits - Filling the Blanks (Q.No. 9)
9.

The total power in the given circuit is ___.

4.8 mW
18 mW
7.2 mW
30 mW
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Jazz said:   8 years ago
1/Rt=1/20+1/8+1/30.
=5/24

Rt=24/5
I= V/R
12*5/24=5/2.

P=VI.
=12*5/2,
=30mW.

@nusha said:   1 decade ago
p = vi.

v = i*r therefore p=(v^2)/r.

Total resistance = (1/20k)+(1/8k)+(1/30k) = 4.8k ohm.

p = (12*12)/(4.8K) = 30mW.

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