| 1. | A capacitor is charged by using a battery which is then disconnected. A dielectric slab then slipped between the plates, which results in ? | |
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decrease in the potential difference across the plates, reduction in the stored energy, but no change in the charge on the plates.
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increase in the potential difference across the plate, reduction in stored energy, but no change in the charge on the plates.
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reduction of charge on the plates and increase of potential difference across the plates.
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none of these
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Report Question| 2. | A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates ? | |
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becomes zero
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does not change
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increases
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decreases
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| 3. | To obtain 3 microFarad capacity from three capacitors of 2 microFarad each, they will be arranged. ? | |
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all the three in parallel
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two capacitors in parallel and the third in series with the combination of first two
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all the three in series
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two capacitors in series and the third in parallel with the combination of first two
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| 4. | A conductor carries a certain charge. When it is connected to another uncharged conductor of finite capacity, then the energy of the combined system is ? | |
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equal to that of the first conductor
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uncertain
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more than that of the first conductor
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less than that of the first conductor
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| 5. | The electric potential inside a conducting sphere ? | |
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is zero at every point inside
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remains constant from centre to surface
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decreases from centre to surface
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increases from centre to surface
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| 6. | Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately ? | |
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ellipsoids
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paraboloids
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spheres
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planes
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| 7. | A hollow metal sphere of radius 5 cm is charged so that the potential on its surface is 10 V. The potential at the centre of the sphere is ? | |
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Same as at point 25 cm away from the surface
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0 V
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Same as at point 5 cm away from the surface
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10 V
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| 8. | If a unit positive charge is taken from one point to another over an equipotential surface, then ? | |
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no work is done
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work done is constant
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work is done by the charge
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work is done on the charge
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| 9. | A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is ? | |
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zero
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10/3 V
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10 V
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4 V
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| 10. | A cube of a metal is given a positive charge for this system, which of the following statements is true ? | |
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Electric field varies within the cube
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Electric field is normal to the surface of the cube
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Electric potential within the cube is zero
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Electric potential at the surface of the cube is zero
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