| 1. | At the magnetic north pole of the earth, the value of the horizontal component of earth’s magnetic field and angle of dip are respectively ? | |
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minimum, minimum
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maximum, maximum
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maximum, minimum
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zero, maximum
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Report Question| 2. | Which of the following is the most suitable material for making permanent magnet ? | |
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Copper
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Steel
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Soft iron
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Nickel
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| 3. | The materials suitable for making electromagnets should have ? | |
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low retentivity and high coercivity
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high retentivity and high coercivity
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high retentivity and low coercivity
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low retentivity and low coercivity
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| 4. | Magnetic lines of force due to a bar magnet do not intersect because ? | |
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the lines need magnetic lenses to be made to interest
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a point always has a single net magnetic field
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the lines always diverge from a single force
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the lines have similar charges and so repel each other
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| 5. | The angle of dip at a certain place where the horizontal and vertical components of the earth’s magnetic field are equal is ? | |
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45°
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60°
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75°
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30°
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| 6. | Magnetic moment for solenoid and corresponding bar magnet is ? | |
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more for bar magnet
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equal for both
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more for solenoid
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none of these
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| 7. | The strength of the earth’s magnetic field is ? | |
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zero everywhere.
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having very high value.
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vary from place to place on the earths surface.
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constant everywhere.
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| 8. | The magnetic susceptibility is negative for ? | |
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ferromagnetic material only
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paramagnetic and ferromagnetic materials
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diamagnetic material only
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paramagnetic material only
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| 9. | The ratio of magnetic fields due to a smaller bar magnet in the end on position to broad side on position is ? | |
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1
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1/4
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2
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1/2
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| 10. | The magnetic moment of a bar magnet is thus ........... to the magnetic moment of an equivalent solenoid that produces the same magnetic field. ? | |
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different
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equal
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same
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unequal
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