This questions has Statement - I and Statement - II. Of the four choices given after the Statements, choose the one that best describes into 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

Answer: (d). Statement I: higher range needs a smaller shunt, S = (Ig G)/(I - Ig), so the ammeter resistance becomes smaller. False. Statement II: a shunt (or extra shunt) in parallel diverts more current and increases the range. True. So the answer is (d).

This questions has Statement - I and Statement - II. Of the four… | JEE Main 2013

Q187JEE Main 2013Easy

Kirchhoff's Laws & Measuring Instruments

This questions has Statement - $\text{I}$ and Statement - $\text{II}$ . Of the four choices given after the Statements, choose the one that best describes into two Statements.

Statement - $\text{I}$ : Higher the range, greater is the resistance of ammeter.

Statement - $\text{II}$ : To increase the range of ammeter, additional shunt needs to be used across it.

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Answer: (d)

Statement I: higher range needs a smaller shunt, $S = \frac{I_g G}{I - I_g}$ , so the ammeter resistance becomes smaller. False.
Statement II: a shunt (or extra shunt) in parallel diverts more current and increases the range. True.
So the answer is (d).

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