A small hole is made at the centre of th...

A small hole is made at the centre of the magnet then its magnetic moment

increases

decreases

does not change

none of these

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

MAGNETIC EFFECT OF ELECTRIC CURRENT
TARGET PUBLICATION|Exercise Evaluation Test|12 Videos
MEASUREMENTS
TARGET PUBLICATION|Exercise EVALUATION TEST|17 Videos

Similar Questions

Explore conceptually related problems

If we make small holes in a magnet, then what will be the effect on its magnetic moment?

The product of the length of the magnet and its pole strength is called the moment of a magnet or Magnetic moment. If 'm' is the pole strength and 2l is the length of the magnet then, the moment of the magnet or Magnetic moment is given by. M =m xx 2l . Also, Magnetic moment is a vector quantity, with its direction from south pole to north pole along its axial line. If a bar magnet of magnetic moment 80 units be cut into two halves of equal lengths the magnetic moment of each half will be

A short bar magnet is placed with its north pole pointin north. The neutral point is 10 cm away from the centre of the magnet. If H=0.4G , calculate the magnetic moment of the magnet.

A very small magnet is placed in the magnetic meridian with its south pole pointing north. The null point is obtained 20 cm away from the centre of the magnet. If the earth's magnetic field (horizontal component) at this point be 0.3 Gauss, the magnetic moment of the magnet is

A short bar magnet is placed with its north pole pointing south. The neutral point is 10cm away from the centre of the magnet. If H=0*4 gauss, calculate magnetic moment of the magnet.

The bar magnet produces magnetic induction of 4xx10^(-5)T at a point 10 cm from centre on the axis of magnet.The magnetic moment is

The bar magnet produces magnetic induction of 4 xx 10^(-5)T at a point 10 cm from centre on the axis of magnet. The magnetic moment is The bar magnet produces magnetic induction

A point P is situated at a distance of 20cm from the centre of bar magnet of magnetic moment 8Am^(2) on line which makes an angle of 45^(@) with its axis.The magnetic induction is

TARGET PUBLICATION-MAGNETISM-MCQs

The vector sum of magnetic moments of all electrons inside the atom is...
Text Solution
|
Assertion: Magnetic moment of an atoms is due to both, the orbital mot...
Text Solution
|
A small hole is made at the centre of the magnet then its magnetic mom...
Text Solution
|
A curve between magnetic moment and temperature of magnet is
Text Solution
|
The current carrying loop behaves as magnetic dipole because,
Text Solution
|
The number of small magnetic dipoles in a solenoid is proportional to
Text Solution
|
A straight wire carring current I is turned into a circular loop. If t...
Text Solution
|
The torque on a bar magnet due to the earth's magnetic field is maximu...
Text Solution
|
Rate of charges of torque tau with deflection theta is maximum for a m...
Text Solution
|
The pole strength of a bar magnet is 48 ampere-metre and the distance ...
Text Solution
|
A bar magnet is held perpendicular to a uniform magnetic field. If the...
Text Solution
|
If a needle is suspended at different places on earth then needle beco...
Text Solution
|
The lines of force of earth's magnetic field will be perpendicular to ...
Text Solution
|
A compas needle will show which of the following directions at the ear...
Text Solution
|
A ship is to reach a place 10^@ south of west. In what direction shoul...
Text Solution
|
At a certain place the angle of dip is 30^(@) and the horizontal compo...
Text Solution
|
Magnetic induction due to a short magnet at a point 100 mm from the ce...
Text Solution
|
Two identical magnetic dipoles of magnetic moments 1*0Am^2 each are pl...
Text Solution
|
When a bar magnet of pole strength 'm' and magnetic moment 'M' is cut ...
Text Solution
|
The magnetic induction at a point 1000 mm from the centre of the dipol...
Text Solution
|