have looked thought all my notes and books and can not find the formal on how to do this question. I'm slowly going out of my mind any help would be great(adsbygoogle = window.adsbygoogle || []).push({});

Calculate the maximum current a 140 ohms, 1/2 watt resistor can have flowing through it safely.

Enter answer: mA

Then the 2nd part of the question is

What is the maximum e.m.f. which may be applied to the resistor above without causing overheating?

Enter Part 2 answer: V

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculate the maximum current

**Physics Forums | Science Articles, Homework Help, Discussion**