Chapter 18 - Basic Electric Circuits - Learning Path Questions and Exercises - Conceptual Questions - Page 652: 18

Kirchoff's law states that in any closed loop network, the total voltage around the loop is equal to the sum of all voltage drops within the same loop which is also equal to zero. In other words, the algebraic sum of all voltages within the loop must be equal to zero. The resistance in the path followed by the current decreases the value of the current. Hence, the value of the resistance of an ideal ammeter must be zero so it can measure actual current passing through circuit element.

Kirchoff's law states that in any closed loop network, the total voltage around the loop is equal to the sum of all voltage drops within the same loop which is also equal to zero. In other words, the algebraic sum of all voltages within the loop must be equal to zero. The resistance in the path followed by the current decreases the value of the current. Hence, the value of the resistance of an ideal ammeter must be zero so it can measure actual current passing through circuit element.