All Questions
Tagged with resistance voltage-divider
8
questions
8
votes
8
answers
3k
views
How does the electricity "know" the ratio of the resistance in a voltage divider?
I'm having a hard time conceptualizing what/how things are working in a voltage divider setup. I've read a couple other questions/explanations where the answerer has said to "not think about it in ...
- 1,751
0
votes
4
answers
3k
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Why does voltage reading increase the greater the resistance load?
I'm new to electronics. So basically I already understand Ohm's law and the math behind why this is the case. What I don't get is the idea behind it.
Shouldn't the greater the load resistance be, the ...
user312602
7
votes
5
answers
7k
views
Are these 2 resistors in parallel?
So I had a circuit to analyse and I needed to find the equivalent resistor and then I arrived to a confusion. Are R1 and R3 in parallel?
Here is the circuit.
simulate this circuit – Schematic ...
- 109
6
votes
5
answers
2k
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Non-inverting op-amp
Why is resistor R1 connected to the inverting terminal of the op-amp in a non-inverting op-amp configuration? What will happen if we replace it with a short circuit?
- 99
3
votes
2
answers
1k
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Cermet potentiometer temperature coefficients
I'm engineering a system that is temperature-sensitive, between ~-10-30C. I've moved to using cermet potentiometers because of their sub-200PPM/C temperature coefficients.
If I wire such a pot with ...
- 3,229
1
vote
2
answers
245
views
Why is there a resistor in this circuit?
Why there is a 220 ohm resistor in this circuit? Can't we just connect the thermistor directly to the base of transistor?
- 1,498
-1
votes
3
answers
11k
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The purpose of voltage-dividers in op-amp feedback?
simulate this circuit – Schematic created using CircuitLab
So, here we have a typical op-amp with negative feedback. The non-inverting input is at virtual-ground, and if the input is higher or ...
- 717
-1
votes
3
answers
1k
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Voltage drop through a resistor compared to a Zener diode
A variant of this question has been asked a few times, but not received a response. Usually, we get an analogy with water pressure, or gravity, or a version of Ohm's law; not the actual cause-effect ...
- 197