Pick out the first order system from among the following ?
Correct answer: D. Mercury in glass thermometer kept in boiling water
- A. Damped vibrator
- B. Non-interacting system of two tanks in series
- C. Interacting system of two tanks in series
- D. Mercury in glass thermometer kept in boiling water
Explanation
A mercury-in-glass thermometer has one dominant thermal storage element and therefore follows a first-order response. A damped vibrator and two-tank systems introduce two energy-storage effects and are second-order systems.
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