MCQ
$Joule-second$ is the unit of
- AWork
- BMomentum
- CPressure
- ✓Angular momentum
✓
Answer
Correct option: D.
Angular momentum
d
(d) $\tau = \frac{{dL}}{{dt}}$
(d) $\tau = \frac{{dL}}{{dt}}$
$⇒$ $dL = \tau \times dt$$ = r \times F \times dt$
i.e. the unit of angular momentum is joule-second.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A Carnot engine absorbs an amount $Q$ of heat from a reservoir at an abosolute temperature $T$ and rejects heat to a sink at a temperature of $T/3.$ The amount of heat rejected is
→Which of the following can not determine the state of a thermodynamic system
Acetaldehyde reacts with $C{l_2}$ (in excess) to give
→The excess pressure due to surface tension in a spherical liquid drop of radius r is directly proportional to
In an adiabatic process, the density of a diatomic gas becomes $32$ times its initial value. The final pressure of the gas is found to be $n$ times the initial pressure. The value of $n$ is
→A body of $5\, kg$ weight kept on a rough inclined plane of angle $30^o$ starts sliding with a constant velocity. Then the coefficient of friction is
→Two sound waves of wavelength ${\lambda _1}$ and ${\lambda _2}$ $\left( {{\lambda _2} > {\lambda _1}} \right)$ produce $n\, beats/s$, the speed of sound is
→Two sitar strings, $A$ and $B,$ playing the note $'Dha'$ are slightly out of tune and produce beats and frequency $5\,Hz.$ The tension of the string $B$ is slightly increased and the beat frequency is found to decrease by $3\,Hz$ . If the frequency of $A$ is $425\,Hz,$ the original frequency of $B$ is ... $Hz$
→One end of a spring of negligible unstretched length and spring constant $k$ is fixed at the origin $(0,0)$. A point particle of mass $m$ carrying a positive charge $q$ is attached at its other end. The entire system is kept on a smooth horizontal surface. When a point dipole $\overrightarrow{ p }$ pointing towards the charge $q$ is fixed at the origin, the spring gets stretched to a length $\ell$ and attains a new equilibrium position (see figure below). If the point mass is now displaced slightly by $\Delta \ell \ll \ell$ from its equilibrium position and released, it is found to oscillate at frequency $\frac{1}{\delta} \sqrt{\frac{k}{m}}$. The value of $\delta$ is. . . . . .
→The note"Saa" on the Sarod and the Sitar have the same pitch. The property of sound that is most important in distinguishing between the two instruments is