Question
State the $C.G.S$. unit of work. How it is related to its S.I. unit?

Answer

The C.G.S. unit of work is erg. $1 erg =1$ dyne $\times 1 cm$.
The S.I. unit of work is the joule. 1 joule $=1$ Newton $\times 1$ metre
Relationship: $1 J=1 N \times 1 m$
$=10^5$ dyne $\times 100 cm=10^7$ erg.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A body of mass $m$ falls from a height $h_1$ to a height $h_2$, above the ground $\left(h_1>h_2\right)$. What is the loss of potential energy?
A uniform circular motion is an accelerated motion explain it. State whether the acceleration is uniform or variable? Name the force responsible to cause this acceleration. What is the direction of force at any instant? Draw diagram in support of your answer.
An electric filament lamp is connected to a supply of voltage higher than the recommended value. Give reasons, why compared with a normal performance, the lamp emits a brighter light and its life is shortened.
A ball of mass $0.20$ kg is thrown vertically upwards with an initial velocity of $20 m s ^{-1}$. Calculate the maximum potential energy it gains as it goes up.
What is a solenoid? Why do we usually keep its diameter small in comparison to its length?
Draw a diagram representing a wave of amplitude $4 \ cm$ and wavelength $2 \ m$. If the frequency of the wave is $150 \ Hz$, calculate its velocity.
The diagram below shows three ways in which the string of an instrument can vibrate.

(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.
Classify as real or virtual, the image of a candle flame formed on a screen by a convex lens. Draw a ray diagram to illustrate how the image is formed.
An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
(a) the power of bulb and
(b) the potential difference at its end.
State the conditions of equilibrium for a rigid body.