MCQ
The dimensions of emf in MKS is
- A$M L^{-1} T^{-2} Q^{-2}$
- B$M L^2 T^{-2} Q^{-2}$
- C$M L T^{-2} Q^{-1}$
- ✓$M L^2 T^{-2} Q^{-1}$
✓
Answer
Correct option: D.
$M L^2 T^{-2} Q^{-1}$
(d)
$e=L \frac{d i}{d t} \Rightarrow[e]=\left[M L^2 T^{-2} A^{-2}\right]\left[\frac{A}{T}\right]$
${[e]=\left[\frac{M L^2 T^{-2}}{A T}\right]=\left[M L^2 T^{-2} Q^{-1}\right]}$
$e=L \frac{d i}{d t} \Rightarrow[e]=\left[M L^2 T^{-2} A^{-2}\right]\left[\frac{A}{T}\right]$
${[e]=\left[\frac{M L^2 T^{-2}}{A T}\right]=\left[M L^2 T^{-2} Q^{-1}\right]}$
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 conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced current in wires $A B$ and $C D$ are
→An artificial satellite is placed into a circular orbit around earth at such a height that it always remains above a definite place on the surface of earth. Its height from the surface of earth is
The potential difference $V$ and the current $i$ flowing through an instrument in an ac circuit of frequency $f$ are given by $V=5 \cos \omega t$ volts and $l=2 \sin \omega t$ amperes (where $\omega=2 \pi f)$. The power dissipated in the instrument is
→In circular coil, when no. of turns is doubled and resistance becomes $\frac{1}{4}$ th of initial, then inductance becomes
→When heat energy of $1500$ Joules, is supplied to a gas at constant pressure $2.1 \times 10^5 \mathrm{~N} / \mathrm{m}^2$, there was an increase in its volume equal to $2.5 \times 10^{-3} \mathrm{~m}^3$. The increase in internal energy of the gas in Joules is
→The two ends of a uniform conductor are joined to a cell of e.m.f. $E$ and some internal resistance. Starting from the midpoint $P$ of the conductor, we move in the direction of current and return to $P$. The potential $V$ at every point on the path is plotted against the distance covered $(x)$. Which of the following graphs best represents the resulting curve
→If the refractive angles of two prisms made of crown glass are $10$ and $20$ respectively, then the ratio of their colour deviation powers will be
→Which of the following is not reversible
If a particle of mass $m$ is moving in a horizontal circle of radius $r$ with a centripetal force $\left(-k / r^2\right)$, the total energy is
→The Bulk modulus for an incompressible liquid is