All Questions
6
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
0
votes
1
answer
545
views
Why does the resistance of a brushed Dc motor from an experiment kit vary?
I am currently performing an experiment in which I measure the Current and Voltage of a motor that experiences changes in load. I am using a 3V (3V battery) supply however the voltmeter's (connected ...
-1
votes
2
answers
303
views
i have a question about the analogy between Hydraulic system and Electrical system
In Hydraulic system the Pump out oil "" flow "" , It doesn't out pressure , well what create the pressure is the " restriction " or "" orifice "" or "" resistance "" .
In Electrical system , The ...
- 1
0
votes
2
answers
963
views
Calculating voltage in a simple circuit
If I had a 12V battery and wanted to use an LED that used 2V and 20mA, then I need a resistor that will drop 10V and provide enough resistance to produce a current of 20mA.
Therefore I would use R=V/I ...
- 345
-1
votes
2
answers
931
views
How does one determine the voltage of a node?
This sounds like a very straightforward question, and probably has an obvious answer. I've read a section in a physics book on electricity, I've read a textbook on DC and this simple concept seems to ...
- 717
2
votes
2
answers
5k
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Measuring current around 20 amps
I have an electrolyzer that works with car battery (12 volts DC) and draws current around 15 amps. I have a digital multimeter that can measure 10 amps at most. So how can I measure the current? Maybe ...
- 125