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# Please,please help me This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statemens.Statement - I : Higher the range, greater is the resistance of ammeter.Statemen

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statemens.

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.

• Option 1)

Statement - I is false, Statement - II is true.

• Option 2)

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

• Option 3)

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

• Option 4)

Statement - I is true, Statement - II is false.

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As discussed in-

Required shunt -

$s= \frac{i_{g}G}{(i-i_{g})}$

- wherein

$i_{g}-$ Current through galvanometer

The answer follows from basic Principle of stunt and its use to make an ammeter:

$s=\frac{I_{g}}{I-I_{g}}$

Option 1)

Statement - I is false, Statement - II is true.

This option is correct.

Option 2)

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

This option is incorrect.

Option 3)

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

This option is incorrect.

Option 4)

Statement - I is true, Statement - II is false.

This option is incorrect.

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