MCQ
Dimensions of magnetic field intensity is
- A$\left[M^0 L^{-1} T^0 A^1\right]$
- B$\left[M L T^{-1} A^{-1}\right]$
- ✓$\left[M L^0 T^{-2} A^{-1}\right]$
- D$\left[M L T^{-2} A\right]$
✓
Answer
Correct option: C.
$\left[M L^0 T^{-2} A^{-1}\right]$
(c) $B=\frac{F}{I L}=\frac{\left[M L T^{-2}\right]}{[A][L]}=\left[M T^{-2} A^{-1}\right]$
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
In a transformer, the number of turns in primary and secondary are $500$ and $2000$ respectively. If current in primary is $48 \mathrm{~A}$, the current in the secondary is
→A source producing sound of frequency $170 \mathrm{~Hz}$ is approaching a stationary observer with a velocity $17 \mathrm{~ms}$. The apparent change in the wavelength of sound heard by the observer is (speed of sound in air $=340 \mathrm{~ms}$ )
→A load $W$ produces an extension of $1 mm$ in a thread of radius $r$ : Now if the load is made $4 W$ and radius is made $2 r$ all other things remaining same, the extension will become
→Each atom of an iron bar $(5 \mathrm{~cm} \times 1 \mathrm{~cm} \times 1 \mathrm{~cm})$ has a magnetic moment $1.8 \times 10^{-23} \mathrm{Am}^2$. Knowing that the density of iron is $7.78 \times 10^3 \mathrm{~kg}^{-3} \mathrm{~m}$, atomic weight is $56$ and Avogadro's number is $6.02 \times 10^{23}$ the magnetic moment of bar in the state of magnetic saturation will be
→An iron rod of volume $10^{-4} \mathrm{~m}^3$ and relative permeability $1000$ is placed inside a long solenoid wound with $5$ turns $/ \mathrm{cm}$. If a current of $0.5 A$ is passed through the solenoid, then the magnetic moment of the rod is
→If the initial velocity of a projectile be doubled, keeping the angle of projection same, the maximum height reached by it will
If $\phi_1$ and $\phi_2$ be the angles of dip observed in two vertical planes at right angles to each other and $\phi$ be the true angle of dip, then
→A bar magnet has coercivity $4 \times 10^3 \mathrm{Am}^{-1}$. It is desired to demagnetise it by inserting it inside a solenoid $12 \mathrm{~cm}$ long and having $60$ turns. The current that should be sent through the solenoid is
→An equiconvex lens is cut into two halves along (i) $X O X$ and (ii) YOY as shown in the figure. Let $f, f^{\prime}, f^{\prime \prime}$ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following.
→Choose the correct statement from the following.
A body of mass $100 g$ is rotating in a circular path of radius $r$ with constant velocity. The work done in one complete revolution is
→