Measurements

Q.11: The SI unit of heat is

• Power
• Joule
• Kelvin
• Metre

^{Q.12: The unit of focal power of a lens is}  

• Dioptre
• Metre
• Micron
• Debye

Q.13: Which one is the smallest unit?

• Millimeter
• Angstrom
• Fermi
• Metre 

Q.14: If unit of length, mass and time each be doubled, the unit of work is increased by

• 2 times
• 4 times
• 6 times
• 8 times

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