Question

Write the relation between joule and erg?​

Answer 1

Answer:

Joule is the SI unit of energy while erg is the cgs unit of energy.

1 Joule of Energy = 1 Newton x 1 metre

1 erg= 1 dyne x 1 cm

1 joule=  1 newton x 1 metre=105 dynes x 102 cm=107 erg

1 J = 107 erg

Therefore, 1 Joule is equal to 107 erg.

Answer 2

The relation between joule and erg is 1 joule = 10⁷ erg.

• Joule and erg are the dimensions of work.
• Work is measured by the product of the applied force and the displacement of the body in the direction of that force.
• It is a scalar quantity.
• In the CGS system, the absolute unit of work is 'erg'.
• If a force of 1 dyne produces a displacement of 1 cm in the direction of the force, the work done is called 1 erg.

        $1 joule = 1 newton * 1 metre$

                   $= 10^{5} dyne * 10^{2} cm$

                   $= 10^{7} erg$