| 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 [JEE MAIN 2013] |
A) Statement - I is true, Statements - II is true, Statement - II is the correct explanation of Statements - 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.
Correct Answer: D
Solution :
| [d] \[{{i}_{1}}=\left( \frac{r}{{{R}_{2}}+r} \right)i;{{i}_{1}}=\] |
| Maximum allowed current through ammeter coil. |
| r = resistance of the shunt. To increase the range i, r has to be reduced so effective resistance of ammeter decreases. |
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