The Water Analogy
One of the clearest ways to understand these concepts is through a water pipe analogy:
Suppose there is 10 feet (or whatever other length, doesn’t matter) of round pipe in which water is moving/rotating and at one point, there is a motor/propeller/generator fit to increase/create water pressure. Although after one rotation, the water comes at the same starting, generating/propelling motor point.
When 12 v battery’s this thrust/pressure weakens, that would mean its voltage would be reduced. So, Voltage is like the water pressure (pani ki dhkk) pushing water through a pipe.
And here, Current would be the flow rate (volume) of water passing through the pipe (at any one point). Ampere= Volume. Though both are related/proportionate to each other. Both multiplied equal to total wattage. So watts being constant, one’s increase would mean decrease of the other.
Resistance may be anything hindering that flow or pressure of water, or both. The resistor/resistance can be the pipe’s diameter also-- a narrower pipe (higher resistance) restricts volume flow (but would increase pressure), while a larger pipe (lower resistance) allows more flow (= current, pressure change not necessary).
If water pushes thru more power thru the resistor, but that passage is very narrow, then volts are high but amperes less, and vice versa. Very much clear.
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A resistor does not reduce current, e.g. from 5A to 2.2mA — it prevents more than 2.2mA from ever flowing at all.
The resistances / resistors slow the whole queue, whole circuit, not only after the gate of entrance of resistor, but its effect is seen before the entry gate also!!!
Understood fully. Suppose electricity comes into my home after passing thru my home meter. Now in any room I install a resistor in phase line. Now the current won’t be reduced after that resistor only! It’d be reduced in my whole home.
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More current means more electrons passing a point per second. The ampere (A) is defined as one coulomb of charge passing per second.
Good:
Voltage = Current × Resistance (V = I × R)
Acc to above, if you keep resistor constant valued, then if voltage increases, current would also increase and if current increases voltage would also increase.
Or conversely, if voltage is steady, then increasing in current would mean decrease in resistor, or increase in resistor, decrease in current. CLEAR
While Ohm’s Law (V = I × R) shows that voltage and current are related, the relationship depends on resistance:
In a fixed-resistance circuit: more current requires more voltage
In a fixed-voltage circuit: lowering resistance increases current without changing voltage
The cause-effect relationship goes from voltage to current, not the reverse.
#current #ampere #voltage #resistance #resistor