Ohm's Law

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

A 1/4 W

B 1/2 W

C 1 W

D 2 W

ANS:B - 1/2 W

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.

Share :

img not found

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.