Electrostatic Potential & Capacitance

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Electrostatic Potential & Capacitance - 03

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Q1. 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 *

1 point

10 V

0 V

3/10 V

4 V

Q2. A charge is brought from a point on the equatorial plane of a dipole to its mid-point. Which of the following quantities remains constant ? *

1 point

Electric field

Force on the charge brought.

Torque exerted by the charge on dipole.

Electric potential

Q3. On decreasing the distance between the plates of a parallel plate capacitor, its capacitance *

1 point

increases

decreases

first increases then decreases.

remains unaffected

Q4. Energy is stored in a capacitor in the form of *

1 point

electrostatic energy

magnetic energy

light energy

heat energy

Q5. If in a parallel plate capacitor, which is connected to a battery, we fill dielectrics in whole space of its plates, then which of the following increases? *

1 point

E and C

Q and C

V and E

Q and V

Q6. A capacitor works in *

1 point

A. C. circuits

D. C. circuits

In Both Circuits

None of them

Q7. In a charged capacitor, the energy is stored in *

1 point

(a) the negative charges

(b) the positive charges

(d) both (a) and (b)

Q8. A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor *

1 point

becomes infinite

increases

remains unchanged

decreases

Q9. The potential gradient at which the dielectric of a condenser just gets punctured is called *

1 point

dielectric constant

dielectric strength

dielectric number

dielectric resistance

Q10. When air in a capacitor is replaced by a medium of dielectric constant K, the capacity *

1 point

remains constant

increases K times

increases K^2 times

decreases K times

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