| 1. | A test charge is moved from lower potential point to a higher potential point. The potential energy of test charge will ? | |
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remain the same
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decrease
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become zero
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increase
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Report Question| 2. | A conductor with a positive charge ? | |
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is always at zero potential.
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is always at +ve potential.
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may be at +ve, zero or -ve potential.
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is always at negative potential.
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| 3. | In a region of constant potential ? | |
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the electric field is zero
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the electric field is uniform
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the electric field shall necessarily change if a charge is placed outside the region
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None of these
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| 4. | When air in a capacitor is replaced by a medium of dielectric constant K, the capacity ? | |
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remains constant
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decreases K times
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increases K times
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increases K^2 times
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| 5. | Two metal pieces having a potential difference of 800 V are 0.02 m apart horizontally. A particle of mass 1.96 × 10 kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle is ? | |
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6
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3
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0.1
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8
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| 6. | The potential gradient at which the dielectric of a condenser just gets punctured is called ? | |
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dielectric number
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dielectric resistance
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dielectric constant
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dielectric strength
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| 7. | In a parallel plate capacitor, the capacity increases if ? | |
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dielectric constantly decreases.
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area of the plate is increased.
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distance between the plates increases.
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area of the plate is decreased.
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| 8. | The radii of two metallic spheres A and B are r1 and r2 respectively (r1 > r2). They are connected by a thin wire and the system is given a certain charge. The charge will be greater ? | |
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zero on both.
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on the surface of the sphere B.
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on the surface of the sphere A.
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equal on both.
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| 9. | 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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| 10. | Equipotential surfaces ? | |
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will be more crowded near sharp edges of a conductor.
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are closer in regions of large electric fields compared to regions of lower electric fields.
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will always be equally spaced.
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both (a) and (b) are correct.
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