Answer & Solution
Answer: Option C
Solution:
We need to find the
power rating of the resistor.
The formula we'll use is:
P = I2R, where:
* P is the power (in Watts)
* I is the current (in Amperes)
* R is the resistance (in Ohms)
First, convert the current from milliamperes (mA) to amperes (A):
25 mA = 25 / 1000 A = 0.025 A
Now, plug the values into the formula:
P = (0.025 A)
2 * 120 Ω
P = 0.000625 * 120 W
P = 0.075 W
Convert Watts(W) to milliWatts(mW):
0. 075 W = 0.075 * 1000 mW = 75 mW
So, the resistor rating should be at least
75 mW.
