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
Charge is distributed within a sphere of radius $R$ with a volume charge density $\rho (r) = \frac{A}{{{r^2}}}{e^{ - 2r/a}}$ where $A$ and $a$ are constants. If $Q$ is the total charge of this charge distribution, the radius $R$ is.
→At a place, if the earth's horizontal and vertical components of magnetic fields are equal, then the angle of dip will be.......$^o$
→Three forces acting on a body are shown in the figure. To have the resultant force only along the $y-$ direction, the magnitude of the minimum additional force needed is.........$N$
→The net charge in a current carrying wire is zero still magnetic field exerts a force on it, because a magnetic field exerts force on
An ideal gas is taken reversibly around the cycle $a-b-c-d-a$ as shown on the temperature $T$ - entropy $S$ diagram. The most appropriate representation of above cycle on a internal energy $U$ - volume $V$ diagram is
→A student records $\Delta Q, \Delta U \& \Delta W$ for a thermodynamic cycle $A$ $\rightarrow$ $B \rightarrow C \rightarrow A$. Certain entries are missing. Find correct entry in following options.
→Consider an initially neutral hollow conducting spherical shell with inner radius $r$ and outer radius $2 r$. A point charge $+Q$ is now placed inside the shell at a distance $r / 2$ from the centre. The shell is then grounded by connecting the outer surface to the earth. $P$ is an external point at a distance $2 r$ from the point charge $+Q$ on the line passing through the centre and the point charge $+Q$ as shown in the figure. The magnitude of the force on a test charge $+q$ placed at $P$ will be
→Displacement current is given by
If $\lambda_1$ and $\lambda_2$ denote the wavelengths of de Broglie waves for electrons in the first and second Bohr orbits in a hydrogen atom, then $\lambda_1/\lambda_2$ is equal to
→A conducting rod with resistance $r$ per unit length is moving inside a vertical magnetic field $\vec B$ at constant speed $v$ on two horizontal parallel ideal conductor rails.The ends of the rails ae connected to a resistor $R.$ The separation between the rails is $d.$ The rod maintains a tilted angle $\theta$ to the rails. Find the external force required to keep the rod moving.
→