Question

Which of the following is correct order ?
(a) 1 erg > 1 Joule > 1 calorie
(b) 1 erg > 1 calorie > 1 joule
(c) 1 calorie > 1 Joule > 1 erg
(d) 1 Joule > 1 calorie > 1 erg

Answer 1

Answer:

(c) 1 cal > 1 joule > 1 erg >

Answer 2

Answer: c)1 calorie>1 joule>1 erg

Explanation:

Joule is the S.I unit of work or energy. Work done by a force of 1N such that its point of application moves one meter in the direction of action of the force is said to be 1 joule.

A calorie is a unit of energy. The calorie was originally defined as the amount of heat required to raise the temperature of 1 gram of water by 1° Celsius at 1 standard atmosphere.  One calorie is equal to approximately 4.2 joules.

One erg is work done by a force equal to 1 dyne such that point of application moves by 1cm in the direction in which force acts.