Physics
Assertion (A) : An ammeter is used to measure potential difference between two points of circuit.
Reason (R) : An ammeter must have a very low resistance.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Current Electricity
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Answer
assertion is false but reason is true
Explanation
Assertion (A) is false because an ammeter is used to measure current, not potential difference and to measure potential difference, voltmeter is used.
Reason (R) is true because an ammeter is connected in series in a circuit and to not affect the current it is measuring, its resistance should be as low as possible.
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