| 1. | In a charged capacitor, the energy is stored in ? | |
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the field between the plates
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the positive charges
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the negative charges
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both (a) and (b)
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Report Question| 2. | A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system ? | |
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increases by a factor of 4.
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increases by a factor of 2.
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decreases by a factor of 2.
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remains the same.
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| 3. | Two metal plates form a parallel plate capacitor. The distance between the plates is d. A metal sheet of thickness d2 and of the same area is introduced between the plates. What is the ratio of the capacitance in the two cases ? | |
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5 : 1
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3 : 1
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1 : 2
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2 : 1
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| 4. | Which of the following statement is true ? | |
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Potential at a point is the work done per unit charge in bringing a charge from any point to infinity.
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Electrostatic force is a conservative force.
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Potential is the product of charge and work.
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Electrostatic force is non-conservative
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| 5. | Which of the following statements is false for a perfect conductor ? | |
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The electric field just outside the surface of a conductor is perpendicular to the surface.
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The surface of the conductor is an equipotential surface.
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The charge carried by a conductor is always uniformly distributed over the surface of the conductor.
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None of these.
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| 6. | A unit charge moves on an equipotential surface from a point A to point B, then ? | |
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VA – VB = – ve
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it is stationary
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VA – VB = + ve
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VA – VB = 0
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| 7. | There are two metallic spheres of same radii but one is solid and the other is hollow, then ? | |
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they can be charged equally (maximum)
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solid sphere can be given more charge
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hollow sphere can be given more charge
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None of the above
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| 8. | Capacitors are used in electrical circuits where appliances need more ? | |
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current
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power
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voltage
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resistance
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| 9. | Which of the following options are correct? If a conductor has a potential V 4- 0 and there are no charges anywhere else outside, then ? | |
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there cannot be any charge in the body of the conductor.
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there must be charges inside the surface.
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there must not be charges on the surface or inside itself.
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there must be charges only on the surface.
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| 10. | Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately ? | |
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planes
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paraboloids
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spheres
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ellipsoids
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