A thermometer reads 25°C. What is the corresponding temperature in Kelvin?
A. 325 K
B. 273 K
C. 298 K
D. 248 K
Answer: Option C
Solution (By JKExamLibrary)
To convert a temperature from Celsius to Kelvin, the formula is K = °C + 273.15. For most physics problems, we use 273. Therefore, K = 25 + 273 = 298 K. Kelvin is the SI unit of temperature, and it never uses a degree symbol.
Explanation:
Candela (cd) is one of the seven SI base units, measures luminous intensity. Lumen is luminous flux (lm = cd·sr). Lux is illuminance (lx = lm/m²). Watt is power.
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