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- 1. Multiple Choice
Magnetic lines of force around a bar magnet ____.
travel from north to south inside the magnet
travel from south to north outside the magnet
travel from north to south outside the magnet
are parallel to the placement of the magnet
- 2. Multiple Choice
A freely suspended magnetic needle points to the geographical north-south direction. Identify the device that works on this principle.
- 3. Multiple Choice
Pick the correct statement(s) related to “magnetic lines of force”.
They attract each other.
They intersect each other.
They are directed from the north pole to the south pole inside the magnet.
They are directed from the south pole to the north pole inside the magnet.
- 4. Multiple Choice
The magnetic compass is placed in a/an _____.
aluminum case
gold case
copper case
iron case
- 5. Multiple Choice
A magnet in which the poles are close to each other is ____.
- 6. Multiple Choice
Earth’s magnetic field is strongest at ____.
the equator
the poles
the Tropic of Cancer.
the Tropic of Capricorn
- 7. Multiple Choice
The strength of the magnetic field around a bar magnet ____
increases with increase in distance from it.
decreases with increase in distance from it.
remains the same with increase in distance from it.
first increases and then decreases with increase in distance from it.
- 8. Multiple Choice
The geographical north pole of the earth behaves like a _____.
magnetic south pole
magnetic north pole
magnetic east pole
magnetic west pole
- 9. Multiple Choice
____ is the area around a magnet where its influence can be detected.
Magnetic lines of force
Magnetic north pole
Magnetic field
Magnetic south pole
- 10. Multiple Choice
Match the following:
{i-I, ii-II, iii-IV, iv-III}
{i-III, ii- IV, iii-I, iv-II}
{i-II, ii-I, iii-III, iv- IV}
{i-III, ii-II, iii-I, iv-IV}
- 11. Multiple Choice
The strength of a bar magnet is ____ at the ends and ____ in the middle.
weak, weak
weak, strong
strong, weak
strong, strong
- 12. Multiple Choice
Magnetic lines of force can pass through____.
iron
wood
glass
all of the above
- 13. Multiple Choice
The earth’s magnetic field is weakest at the ____.
North pole
South pole
Arctic zone
Equator
- 14. Multiple Choice
At the equator, the magnetic lines of forces will _____ the
earth’s surface.
intersect
be parallel to
be concentric with
be perpendicular to
- 15. Multiple Choice
The power of attraction of a horseshoe magnet is _____ a bar magnet.
same as
half that of
twice as much as
thrice as much as
- 16. Multiple Choice
The magnet used in a magnetic compass is a/an ___.
permanent magnet
temporary magnet
electromagnet
lodestone
- 17. Multiple Choice
Raghu had two bar magnets with him. He drew the magnetic lines of force for both these magnets with a tracing compass and observed that magnet A showed more magnetic lines in comparison to magnet B. What will be the conclusion about the strengths of these two magnets?
Magnet A and magnet B will have the same magnetic field strength.
Magnet A will have more field strength than magnet B.
Magnet B will have more field strength than magnet A.
Magnetic field strength is not related to the magnetic lines of force.
- 18. Multiple Choice
The needle of a magnetic compass is made of _____.
Copper
Gold
Steel
Zinc
- 19. Multiple Choice
The area where the earth’s magnetic influence is felt is known as the _______.
earth’s magnetic field.
earth’s gravitational field
earth’s north pole
earth’s south pole
- 20. Multiple Choice
Choose the correct statement about the Earth’s magnetic
field:
The earth’s magnetic field can be reversed.
The earth’s magnetic field does not affect human health
The earth’s magnetic field causes earthquakes.
The earth’s magnetic field is responsible for the moon orbiting around the earth.
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