Which of the following SI units is INCORRECTLY matched with its physical quantity?
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A.
Electric charge – Coulomb (C)
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B.
Power – Watt (W)
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C.
Pressure – Newton per metre (N/m)
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D.
Work – Joule (J)
Correct Answer:
C. Pressure – Newton per metre (N/m)
Explanation:
The SI unit for pressure is the Pascal (Pa), which is defined as one Newton per square metre (N/m²). The unit listed in the option, Newton per metre (N/m), actually refers to surface tension or the spring constant, not pressure. All other pairs are correctly matched: electric charge is measured in Coulombs, power in Watts, and work in Joules. Therefore, the incorrect match is pressure.
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