This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement - I: Higher the range, greater is the resistance of ammeter. Statement - II: To increase the range of ammeter, additional shunt needs to be used across it.

Question

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement - I: Higher the range, greater is the resistance of ammeter. Statement - II: To increase the range of ammeter, additional shunt needs to be used across it. (A) Statement - I is true, Statement - II is true, Statement - II is the correct explanation of Statement-I (B) Statement - I is true, Statement - II is true, Statement - II is not the correct explanation of Statement-I (C) Statement - I is true, Statement - II is false (D) Statement - I is false, Statement - II is true

Tardigrade Admin · Accepted Answer

For Ammeter, S =( I g G / I - I g ) So, for I to increase, S should decrease, so additional S can be connected across it.

Statement - I is true, Statement - II is true, Statement - II is the correct explanation of Statement-I

Statement - I is true, Statement - II is true, Statement - II is not the correct explanation of Statement-I

Statement - I is true, Statement - II is false

Statement - I is false, Statement - II is true

For Ammeter, S=I−Ig​Ig​G​ So, for I to increase, S should decrease, so additional S can be connected across it.

For Ammeter, $S = \frac{I _{g} G}{I - I _{g}}$
So, for I to increase, S should decrease, so additional $S$ can be connected across it.