The following are some units i. Ns ii. Mm iii. Nm\(^-2\) iv. JKg\(^-1\). What are the units of latent heat?

  • A i
  • B ii
  • C iii
  • D iv
jamb 1978physics

The correct answer is D. iv

The unit of latent heat is expressed as energy per unit mass, which is Joule per kilogram (\(Jkg^{-1}\)). 

A. \(Ns\) (Newton second) - This is the unit of momentum, not energy or latent heat.

B. \(Mm\) (This appears to be a typographical error as it's not a standard unit for energy or latent heat. "Mm" could be mistaken for millimetre, which is a unit of length.)

C. \(Nm^{-2}\) (Newton per square meter) - This is the unit of pressure, not latent heat.

D. \(JKg^{-1}\) (Joule per kilogram) - This is the correct unit for latent heat.

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