Electronics - Voltage and Current - Discussion
Discussion Forum : Voltage and Current - General Questions (Q.No. 9)
9.
In practical applications, battery voltage:
Discussion:
45 comments Page 1 of 5.
Shatakshi said:
8 years ago
P=VI and I=V/R.
We have these two laws. And most people get confused due to this. I will answer as simply as I can and I hope that everyone can understand my explanation.
In a circuit, in order for equipment to not become damaged, the power remains constant throughout the entire operation. It is true that current and voltage are directly proportional. So if current increases so will the voltage. But, The power needs to remain constant to balance the circuit. What happens then? Voltage and current are variable but power is constant.
So in order for the power to remain constant, if voltage becomes twice its initial value current must become 1/2 of its original value.
As P = VI. So, doing this the Power stays constant and the circuit is balanced.
We have these two laws. And most people get confused due to this. I will answer as simply as I can and I hope that everyone can understand my explanation.
In a circuit, in order for equipment to not become damaged, the power remains constant throughout the entire operation. It is true that current and voltage are directly proportional. So if current increases so will the voltage. But, The power needs to remain constant to balance the circuit. What happens then? Voltage and current are variable but power is constant.
So in order for the power to remain constant, if voltage becomes twice its initial value current must become 1/2 of its original value.
As P = VI. So, doing this the Power stays constant and the circuit is balanced.
(2)
SYAMALA said:
7 years ago
The battery is already charged now when the load is connected it is in discharging mode.
So when load increases (here load increases means a device that we connected is drawing more current from source) voltage will come down gradually.
So it is not like R increases I decreases so V decreases.
One important thing is load resistance increases means are increasing.
But load increasing means the current that is drawing by the device is increasing.
So when load increases (here load increases means a device that we connected is drawing more current from source) voltage will come down gradually.
So it is not like R increases I decreases so V decreases.
One important thing is load resistance increases means are increasing.
But load increasing means the current that is drawing by the device is increasing.
(1)
Sreelakshmi said:
8 years ago
I am not getting it. Please explain me clearly.
(1)
Raj chauhan said:
1 decade ago
For here p=vi rule works because of load (power).
Rathi said:
1 decade ago
Note:
In Practical Applications battery voltage is lowered as load increases.
Or
In Practical Applications battery voltage is lowered as load Resistance decreases .
Both are correct. Hope Understood meaning of Load and Load resistance.
In Practical Applications battery voltage is lowered as load increases.
Or
In Practical Applications battery voltage is lowered as load Resistance decreases .
Both are correct. Hope Understood meaning of Load and Load resistance.
Aryan said:
1 decade ago
Whats the difference between load and load resistance?
Sharma said:
1 decade ago
When in our home we switch on many heavy electrical devices simultaneously then automatically the tube lights get dim. And that is only due to the dropping of voltage. That's it. :).
Srinu said:
1 decade ago
Its very simple when we use some energy then automatically battery discharge.
Sindhu jyesta said:
1 decade ago
As load increases current decreases through resistance so that battery (voltage) discharges automatically.
Sujeet kumar said:
1 decade ago
What is different between inductor and capcitor?
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