Question 2 :
___ pole of a normalmagnet is directing in ___side of the earth. Fill in the blank.
Question 3 :
The magnetic compass is not useful for navigation near the magnetic poles, since
Question 4 : <span class="wysiwyg-font-size-medium"><span class="wysiwyg-font-size-medium"><p class="wysiwyg-text-align-left">The magnitude of magnetic moment of a semi circular magnet of radius $r$ and pole strength $m$ is :<br/></p>
Question 5 :
Why permanent magnets are kept with soft iron pieces at ends as keepers ?<br/>
Question 7 :
A short bar magnet placed on the table along the north south line. Its north pole is directed towards geographical north then location of neutral points is?
Question 8 :
Write true or false for each statement.<br>A magnet can attract only a magnetic substance.
Question 9 :
By which of the following activity, a magnet can loose its property?
Question 10 :
Which of the following properties is 'False' for a bar magnet?
Question 12 :
Assertion: The true geographic north direction is found by using a compass needle.
Reason: The magnetic meridian of the earth is along the axis of rotation of the earth.
Question 14 :
An object weighs less at the equator than at the poles because.
Question 15 :
When the N-pole of a magnet is placed near the S-pole of another magnet then it _______ the south pole.<br/>
Question 17 :
When the north pole of a strong magnet is brought near to the north pole of a weak magnet then they will<br>
Question 19 :
To find the S-pole of a compass is to find the end of the compass needle that.
Question 20 :
Two objects repel each other. This repulsion could be due to<br>
Question 21 :
On the basis of following features identify the correct option<br>I. They always start from north pole and end at the southpole of the magnet outside the magnet.<br>II. They never intersect each other.
Question 22 :
Complete the following statements with an appropriate word / term to be filled in the blank space(s).A compass needle is a ________ magnet :<br/>
Question 23 :
Write true or false for each statement.<br>Magnetic poles occur in pairs.<br>
Question 26 :
A domain in a ferromagnetic substance is in form of a cube of side length $1 \,\mu m$. It is contains $8 \times 10^{10}$ atoms and each atomic dipole has a moment of $9 \times 10^{-24} A \,m^2$, then the magnetization of the domain is then<br/>
Question 28 :
A mixture of iron and nickel can be easily magnetized, even in a weak field. Which results inthe formation of a ________. Fill in the blank.
Question 30 :
A thin bar magnet of length L is bent in the middle to form an angle of $60^0$. The new length of the magnet is :
Question 32 :
The force of attraction of a magnet is maximum at :
Question 33 :
A. Ferromagnetic materials will lose their magnetism if heated above a point known as the Curie temperature.<br>B.You would have to re-magnetize the magnet again, either in a solenoid or with another permanent magnet, in order to restore the magnetism.<br>C.If you heat a magnet up a little bit, it will lose some of its magnetism, but on returning to room temperature full magnetism can be restored.<br>Which among the following is/are true?
Question 36 :
A magnet can be completely demagnetized by which one of the following processes?
Question 37 :
At the magnetic poles of magnet, its attractive power is minimum.<br>
Question 38 :
A small magnet is placed perpendicular to a constant magnetic field. The forces acting on the magnet will result in<br>
Question 39 :
The answer to which of the following options will distinguish between a magnetic material and a non-magnetic material?
Question 40 :
The magnetic susceptibility of a paramagnetic material at $-73^{\circ}C$ is $0.0075$ and its value at $-173^{\circ}C$ will be
Question 41 :
State True or False :<br/>A child staying in a coastal region tests the drinking water  with his tester. He finds that the compass needle deflects more in the case of sea water.
Question 42 :
Assertion: The poles of magnet cannot be separated by breaking into two pieces.
Reason: The magnetic moment will be reduced to half when a magnet is broken into two equal pieces.
Question 44 :
A permanent magnet in the shape of a thin cylinder of length $10$cm has magnetisation $(M) = 10^6 A m^{-1}$. It's magnetization current $I_M$ will be then<br/>
Question 45 :
A magnetic needle is kept in a non-uniform magnetic field. It experiences
Question 46 :
If a piece of metal was thought to be magnet, which one of thefollowing observations would offer conclusive evidence
Question 48 :
A rod of cross-sectional area $10$ $cm^2$ is placed with its length parallel to a magnetic field of intensity $1000$ ${A/m}$ , the flux through the rod is $10^4$ $webers$. Then the permeability of material of the rod is:
Question 49 :
A compass needle placed at a distance $r$ from a short magnet in a position shows a deflection of ${60}^{o}$. If the distance is increased to $r{(3)}^{1/3}$, then deflection of compass needle, in degrees, is :
Question 50 :
At which part of a magnet is its magnetic force maximum?
