how it power depends on resistance explain plz
Answers
Power in electronics is the rate of doing work. Resistance is the opposition offered against the flow of electrons. The relation between power and resistance is proportional. In physics, power and resistance can be related using two formulas.
Power and Resistance
The relation between Power and Resistance can be mathematically expressed in two ways, as follows-
P = I2R
where P is the Power measured in watt
R is the resistance measured in ohms
I is the electric current measured in coulombs
P=V2R
Where,
* P is the Power measured in watt
* R is the resistance measured in ohms
* V is the electric potential measured in volts
Power And Resistance Relation:-
Both the formula mentioned above gives the relation between power and resistance. Consider P = I2R the electric power is directly proportional to resistance keeping I constant. Which implies-
When power increases, the resistance will also increase keeping current I constant.
When Resistance decreases, Power also reduces keeping current I constant.
Consider P=V2R here, Power P is inversely proportional to Resistance R. which implies that-
For any constant Potential difference :-
When power is high, resistance will be low.
When power is low, the resistance will be high.
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