| 1. | A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act ? | |
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towards north.
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vertically downwards.
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towards east.
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vertically upwards.
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Report Question| 2. | Which among of these are the main characteristics of fuse element ? | |
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low melting point
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High conductivity
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do not bum due to oxidation
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All of the above
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| 3. | A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid ? | |
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will become zero
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will increase
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will remains same
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will decrease
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| 4. | Relative strength of magnetic field at a point in the space surrounding the magnet is shown by the ? | |
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thickness of magnet
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resistance offered by the surroundings
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degree of closeness of the field.
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length of magnet
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| 5. | The strength of magnetic field inside a long current carrying straight solenoid is ? | |
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Found to increase from one end to the other
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Same at all points
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More at the ends than at the center
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Minimum in the middle
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| 6. | In the magnetic field the force acting on the current carrying conductor will be maximum ? | |
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If conductor subtends an angle of 45 degree with the field
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If conductor is parallel to the field
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If conductor subtends an angle of 60 degree with the field
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If conductor is perpendicular to the field
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| 7. | The best material to make permanent magnets is ? | |
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copper
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alnico
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soft iron
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aluminium
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| 8. | If the current values periodically from zero to a maximum value, back to zero and then reverses its direction, the current is ? | |
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pulsating
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direct
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alternative
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none of the above
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| 9. | Which of the following factors affect the strength of force experience by a current carrying conduct in a uniform magnetic field ? | |
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length of the conductor within magnetic field
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magnitude of current in a conductor
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magnetic field strength
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All of above.
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| 10. | The factors on which one magnetic field strength produced by current carrying solenoids depends are ? | |
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Nature of core material
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Number of turns
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Magnitude of current
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All of the above
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