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An ammeter requires a change of 3 A in its coil to produce a change in deflection of the pointer by 12 mm. What is the static sensitivity ?1. 36 mm/A2. 9 mm/A3. 4 mm/A4. 15 mm/A5. |
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Answer» Correct Answer - Option 3 : 4 mm/A Concept: Static sensitivity: It is defined as the ratio of the magnitude of response to the magnitude of the quantity being measured. In simple terms, it can also be said as the ratio of output to input. \(\rm Static\;sensitivity=\frac{\Delta\;Output}{\Delta\;Input}\) Calculation: Given: Output = 12mm, input = 3 A As the input of 3A produces a deflection of 12 mm. \(\rm Static\;sensitivity=\frac{\Delta\;Output}{\Delta\;Input}\) \(\rm Static\;sensitivity=\frac{12}{3}=4\;mm/A\) |
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