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Current Electricity

Question
CBSEENPH12039513

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.

  • 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

Solution

D.

Statement – I is false, Statement – II is true

For Ammeter, S = fraction numerator straight I subscript straight g straight G over denominator straight I minus straight I subscript straight g end fraction
So for I to increase, S should decrease, so additional S can be connected across it.

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