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# SSC JE Magnetic Circuits Quiz 50

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Question 1

When the relative permittivity of the medium is increased, the force between two charges placed at a given distance apart

Question 2

The force between two charges separated by a distance d in air is 10 N. When the charges are placed same distance apart in a medium of dielectric constant , the force between them is 2 N. What is the value of ?

Question 3

Two free protons are separated by a distance of 1A. If they are released, the kinetic energy of each proton when at infinite separation is

Question 4

In a hydrogen atom, the electron revolves around the proton in an orbit of 0.53 A. The potential produced by the electron on the nucleus is

Question 5

Three parallel plates each of area with separation between first and second and between second and third are arranged to form a capacitor. If the dielectric constants are and the capacitance of this capacitor is

Question 6

A particle A has charge +q and particle B has charge of +4q with each of them having the same mass m. When both the particles are allowed to fall from rest through the same potential difference, the ratio of their speeds Question 7

An uncharged capacitor with a solid dielectric is connected to a similar air capacitor charged to a potential If the common potential after sharing of charges is then dielectric constant of the dielectric is

Question 8

Two spherical conductors and of radii and are placed concentrically in air. is given a charge and is earthed. The equivalent capacitance of the system is [See Fig. 6.32] Question 9

The charge on one plate of a 3μF capacitor is 0.12 mC. The energy stored in the capacitor is

Question 10

Two parallel plate capacitors of capacitances and are connected in parallel and charged to potential The battery is then disconnected. The space between the plates of the first is filled with a dielectric of dielectric constant The potential across the capacitors is
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