Electronics - Ohm's Law - Discussion

Discussion Forum : Ohm's Law - Filling the Blanks (Q.No. 5)
5.

The power rating for the resistor in the given circuit should be at least ___.

1/4 W
1/2 W
1 W
2 W
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

DaveD said:   1 decade ago
I = V/R
I = 8/220 or .036A

P = VI
P = 8 * .036 or .290W

Since .290W > 1/4W(.250) you would need at least 1/2W(.500) resistor to handle the power.
(1)

Jaipur boy said:   10 years ago
@Komali.

Here power is the apparent and power. Rating is the max power handling capacity.

Komali said:   1 decade ago
Is the calculation of power and power rating are same?can any one help me. Please.

Dolly said:   1 decade ago
What is the concept behind this?

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