MCQ
One kilowatt hour is equal to
  • $36 \times {10^5}\;J$
  • B
    $36\times{10^3}\;J$
  • C
    $36 \times 10^{-5}\;J$
  • D
    $36 \times 10^{-4}\;J$

Answer

Correct option: A.
$36 \times {10^5}\;J$
a
$1\, kWh = 1000\, W \times 3600 \,sec = 36 \times 10^5\,W-sec\,\, ($ or $J)$

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

The potential energy of a particle of mass $'m'$ situated in a unidimensional potential field varies as $U(x)$ = $U_0 [1-cosax],$  where $U_0$ and $a$ are constants. The time period of small oscillations of the particle about the mean position is
A bullet moving with a velocity of $100\, m/s$ can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet, when the velocity is doubled, will be
If M is the mass of the earth and R its radius, the ratio of the gravitational acceleration and the gravitational constant is:
A wire of density $8 \times 10^3\,kg / m ^3$ is stretched between two clamps $0.5\,m$ apart. The extension developed in the wire is $3.2 \times 10^{-4}\,m$. If $Y =8 \times 10^{10}\,N / m ^2$, the fundamental frequency of vibration in the wire will be $......\,Hz$.
What is the value of acceleration caused by force of gravity on a stone placed on ground?
The velocities of $A$ and $B$ are marked in the figure. The velocity of block $C$ is  ......... $m/s$ (assume that the pulleys are ideal and string inextensible)
$A$ uniform rod $AB$ of mass $m$ and length $l$ is at rest on a smooth horizontal surface.An impulse $J$ is applied $l$ to the end $B$, perpendicular to the rod in the horizontal direction. Speed of particle $P$ at a distance $\frac{{l}}{6}$ from the centre towards $A$ of the rod after time $t = \frac{{\pi m{l}}}{{12J}}$
A number of identical cubical blocks of edge $'a'$ and mass $m$ are lying on a horizontal table. The work done on the blocks in arranging them in a column of height $(n + 1)a$ on the table is
In a capillary tube, water rises to $3\, mm$. The height of water that will rise in another capillary tube having one-third radius of the first is ........ $mm$
A point mass $m$ is suspended from a light thread of length $l$, fixed at $O$, is whirled in a horizontal circle at constant speed as shown. From your point of view, stationary with respect to the mass, the forces on the mass are