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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.
- (1) Statement-I is true but statement-II is false.
- (2) Statement-I is false but statement-II is true.
- (3) If both statement-I and statement-II are true, and statement-II is the correct explanation of statement-I.
- (4) If both statement-I and statement-II are true but statement-II is not the correct explanation of statement-I.
Correct answer: (2) Statement-I is false but statement-II is true.
Solution
Statement-I is incorrect because a higher range of an ammeter actually corresponds to lower resistance, allowing it to measure larger currents without damage. Statement-II is correct as using a shunt resistor is a common method to increase the range of an ammeter.
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