Download App

Permanent Magnets — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsPermanent Magnets1 Mark
Question
A horizontal circular loop carries a current that looks clockwise when viewed from above. It is replaced by an equivalent magnetic dipole consisting of a south pole S and a north pole N:
  1. The line SN should be along a diameter of the loop.
  2. The line SN should be perpendicular to the plane of the loop.
  3. The south pole should be slow the loop.
  4. The north pole should be below the loop.
✓

Answer

  1. The line SN should be perpendicular to the plane of the loop.
  2. The north pole should be below the loop.

A horizontal circular loop carrying current in clockwise direction acts like the south pole of a magnet. Hence, the south pole of the magnet coincides with the loop.

Now, when the loop carrying current in clockwise direction is viewed from above, it looks like the magnetic lines of force are entering the loop thus it acts like south pole of a magnet. And if we view from below the loop then it appears that magnetic lines of force are leaving the loop. Hence, the north pole should be below the loop.

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

Explore more

More "M.C.Q (1 Marks)" from Permanent Magnets→Permanent Magnets — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

A square aluminium (shear modulus is $25 \times 10^{9}\,Nm ^{-2}$ ) slab of side $60\,cm$ and thickness $15\,cm$ is subjected to a shearing force (on its narrow face) of $18.0 \times 10^{4}\,N$. The lower edge is riveted to the floor. The displacement of the upper edge is $.......\mu\,m$.
→
Which of the following statements is true?
→
The pressure and volume of saturated water vapour are $P$ and $V$ respectively. It is compressed isothermally thereby volume becomes $V/2,$ the final pressure will be
→
A person moves 30m North, then 20m East then $30\sqrt{2}$ South-West. His displacement from the original position is:
→
A body is projected from the ground at an angle of $45^{\circ}$ with the horizontal. Its velocity after $2s$ is $20 \,ms ^{-1}$. The maximum height reached by the body during its motion is $m$. (use $g =10\, ms ^{-2}$ )
→
In each of the three arrangements, the block of mass $m_1$ is being pulled left with constant velocity. There is no friction any where. The strings are light and inextensible and pulleys are massless. The ratio of the speed of the block of mass $m_2$ in the three cases respectively is
→
A body has a weight $90\, kg$ on the earth's surface, the mass of the moon is $1/9$ that of the earth's mass and its radius is $1/2$ that of the earth's radius. On the moon the weight of the body is .......... $kg$
→
Inertia is that property of a body by virtue of which the body is
→
Three equal mass satellites $A, B,$ and $C$ are in coplanar orbits around a planet as shown in the figure. The magnitudes of the angular momenta of the satellites as measured about the planet are $L_A, L_B$, and $L_C$. Which of the following statements is correct?
→
A car of mass $1250 kg$  is moving at $ 30m/s$. Its engine delivers $30 kW  $ while resistive force due to surface is $ 750N. $  What max acceleration can be given in the car .............. $\mathrm{m} / \mathrm{s} ^{2}$
→