All Questions
4
questions
1
vote
5
answers
98
views
Measuring power in AC
I have a heater running at 240VAC. I'm trying to measure the power by datalogging the voltage and current then multiply both inorder to get the power reading.
I know that this method works well with ...
- 19
19
votes
3
answers
5k
views
Why does the resistance of a space heater decrease as it gets hot?
I came across something I find odd while hacking a space heater into a high power dummy load: my cheap space heater is rated 1.5 kW 110 VAC, so I expected to see less than 8 ohms which, when heating, ...
- 9,906
0
votes
1
answer
2k
views
Power absorbed by load resistor
Can someone double-check where's the mistake? The system didn't accept my answer.
TASK: Find the maximum power absorbed by the load resistor, knowing that:
$$E = 6.6V; R_{1} = 12.1Ω; R_{2} = 14Ω; R_{...
- 179
-2
votes
2
answers
344
views
Problem with resistance,electric circuit etc. etc.
In which way a resistance is to be connected with a bulb labelled 120W-60V when it is connected with 220V DC source so that maximum illumination with proper security is maintained? What is the ...
- 7