| 1. | The condition for the praenomen of electromagnetic induction is that there must be a relative motion between ? | |
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the coil of wire and magnet
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the coil of wire and galvanometer
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the magnet and galvanometer
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the galvanometer and magnet
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Report Question| 2. | If the key in the given arrangement is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are ? | |
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concentric circles near the point O but of elliptical shapes as we go away from it
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straight lines parallel to each other
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concentric circles
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elliptical in shape
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| 3. | A magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference ? | |
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same in both
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more in (i) than in (ii) case
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more in (ii) than in (i) case
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can’t say
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| 4. | The nature of magnetic field line passing through the centre of current carrying circular loop is ? | |
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parabolic
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straight line
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ellipse
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circular
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| 5. | The magnetic field lines always begin from ? | |
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start from the middle and end at S-pole.
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start from the middle and end at N-pole.
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N-pole and end on S-pole.
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S-pole and end on N-pole.
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| 6. | The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. the magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. the maximum deflection of the galvanometer was observed when the magnet was ? | |
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At rest inside the solenoid
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Moving out of the solenoid
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Moving into solenoid
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Moving towards the solenoid
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| 7. | Choose the correct statement ? | |
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The electric generator works on the principle that when a straight conductor is moved in a magnetic field, then current is induced in the conductor.
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The alternating current AC produced in India has a frequency of 50 Hertz.
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The electric generator converts mechanical energy into electrical energy.
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All the above.
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| 8. | In India the potential difference between live wire and neutral wire is ? | |
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280 V
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220 V
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250 V
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240 V
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| 9. | At the time of short circuit the current in the circuit. ? | |
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increases heavily
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very continuously.
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reduces substantially
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does not change
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| 10. | A plotting compass is placed near the south pole of a bar magnet. the pointer of plotting compass will ? | |
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Point at right angles to the south pole
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Point towards the south pole
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Point parallel to the south pole
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Point away from the south pole
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