Why is it difficult to measure 2000 amps with a series meter?

[Masafi]

Suggest a reason why it is difficult to measure a large current (2000 amps) with a conventional meter in series in the circuit.

The answer is:

Even a very small resistance (in series) with 2000 A through it would generate much heat

Why is this? How do we get this conclusion? From R=V/I? So is the heat produced proprotional to pd?

 

[Redbelly98]

This is a question about the heat or power in a circuit. Look in your textbook or class notes for an equation that relates power P, current, and resistance.

 

[kerimek]

Yes, the heat produced is directly proportional to the potential difference (V) and inversely proportional to the current (I), as stated in the equation R=V/I. This means that as the current increases, the resistance in the circuit also increases, causing a larger amount of heat to be generated. In order to accurately measure a large current of 2000 amps, the conventional meter would need to have a very low resistance, which is difficult to achieve without causing excessive heat and potential damage to the meter itself. This is why specialized equipment, such as a shunt resistor or Hall effect sensor, is often used to measure high currents without the risk of overheating.