Magnetism and Matter Test

Result

Magnetism and Matter Test - 27

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Weekly Quiz Competition

Question 1
4 / -1

The intensity of magnetic field is H and moment of magnet is M. The maximum potential energy is

A
MH

B
2 MH

C
3 MH

D
4 MH

Solution
Question 2
4 / -1

A bar magnet of magnetic moment 200A-m² is suspended in a magnetic field of intensity 0.25N/A-m. The couple required to deflect it through 30° is

A
50 N-m

B
25 N-m

C
20 N-m

D
15 N-m

Solution
Question 3
4 / -1

Two similar bar magnets P and Q, each of magnetic moment M, are taken, If P is cut along its axial line and Q is cut along its equatorial line, all the four pieces obtained have

A
Equal pole strength

B
Magnetic moment M/4

C
Magnetic moment M/2

D
Magnetic moment M

Solution
Question 4
4 / -1

There is no couple acting when two bar magnets are placed coaxially separated by a distance because

A
There are no forces on the poles

B
The forces are parallel and their lines of action do not

C
The forces are perpendicular to each other

D
The forces act along the same line
Question 5
4 / -1

The ultimate individual unit of magnetism in any magnet is called

A
North pole

B
South pole

C
Dipole

D
Quadrupole
Question 6
4 / -1

The magnetic field lines due to a bar magnet are correctly shown in

A

B

C

D
Question 7
4 / -1

The magnetic lines of force inside a bar magnet

A
Are from south-pole to north-pole of the magnet

B
Are from north-pole to south-pole of the magnet

C
Do not exist

D
Depend upon the area of cross-section of the bar magnet
Question 8
4 / -1

Intensity of magnetic field due to earth at a point inside a hollow steel box is

A
Less than outside

B
More than outside

C
Same

D
Zero
Question 9
4 / -1

Earth\'s magnetic field always has a horizontal component except at or horizontal component of earth\'s magnetic field remains zero at

A
Equator

B
Magnetic poles

C
A latitude of 60°

D
An altitude of 60°

Solution
Question 10
4 / -1

A dip needle in a plane perpendicular to magnetic meridian will remain

A
Vertical

B
Horizontal

C
In any direction

D
At an angle of dip to the horizontal