Question

Стрелка гальванометра стоит на нулевом делении шкалы,когда r=o докажите это,применив второе правило кирхгофа

Answer 1

Четко напиши////^-^.......... ........

Answer 2

Applying Kirchhoff's Second Rule to Galvanometer

When the pointer of a galvanometer is at the zero mark on the scale, it means that the current passing through the galvanometer is zero. This can be proven by applying Kirchhoff's second rule, also known as the loop rule or Kirchhoff's voltage law.

According to Kirchhoff's second rule, the algebraic sum of the potential differences in any closed loop of a circuit must be equal to zero. In the case of the galvanometer at the zero mark, we can consider a simple circuit loop where the galvanometer is connected.

Let's assume the galvanometer is part of a simple circuit with a battery and a resistor. The loop rule states that the sum of the potential differences around the loop is zero.

Assuming the resistance of the galvanometer is negligible, the potential difference across the galvanometer is also negligible. Therefore, the potential difference across the galvanometer is effectively zero, indicating that the current passing through the galvanometer is also zero.

This demonstrates that when the pointer of a galvanometer is at the zero mark on the scale, the current passing through it is indeed zero.

In summary, when the pointer of a galvanometer is at the zero mark on the scale, it indicates that the current passing through the galvanometer is zero. This can be proven by applying Kirchhoff's second rule, which states that the sum of potential differences in a closed loop is zero.