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Magnetic Effect of Electric Current - 02
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Q.1. A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be :
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1 point
only in horizontal plane around the magnet
only in vertical plane around the magnet
in all the planes around the magnet
in horizontal as well as in vertical planes around the magnet
Q.2. The magnetic field lines produced by a bar magnet :
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1 point
originate from the south pole and end at its west pole
originate from the north pole and end at its south pole
originate from the south pole and end at its north pole
originate from the north pole and end at its east pole
Other:
Q.3. Which of the following is not attracted by a magnet ?
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1 point
brass
cobalt
steel
nickel
Q.4. The magnetic field lines :
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1 point
An electromagnet to rotate the armature
A soft iron core on which the coil is wound
A permanent magnet to rotate the armature
Effectively large number of turns of conducting wire in the current carrying coil
Q.5. The magnetic field lines:
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1 point
do not cross one another
cross at an angle of 60° to one another
intersect at an angle of 45° to each other
intersect at right angles to one another
Q.6. The north pole of earth’s magnet is in the :
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1 point
geographical south
geographical west
geographical north
geographical east
Q.7. The axis of earth’s magnetic field is inclined with the geographical axis at an angle of about :
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1 point
15°
35°
25°
5°
Q.8. The shape of the earth’s magnetic field resembles that of an imaginary :
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1 point
U-shaped magnet
Current-carrying circular coil
Straight conductor carrying current
Bar magnet
Q.9. A magnet attracts :
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1 point
aluminium
any metal
plastics
iron and steel
Q.10. A plotting compass is placed near the south pole of a bar magnet. The pointer of plotting compass will :
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1 point
point at right angles to the south pole
point away from the south pole
point parallel to the south pole
point towards the south pole
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