Dielectric Constant Of Water
Water constitutes about 70% of earth. Some important distinguishing properties of water are high molar concentration, small dissociation constant and high dielectric constant.
Electrostatic Potential and Capacitance
An electrostatic force is a force caused by stationary electric charges /fields. The electrostatic force is caused by the transfer of electrons in conducting materials. Coulomb’s law determines the amount of force between two stationary, charged particles. The electric force is the force which acts between two stationary charges. It is also called Coulomb force.
Choose correct letter only.
47
47. The potential difference across a 10 μF capacitor to charge it with 10 mC is:
A. 10V
B. 1 kV
C. 1V
D. 100V
48. The charge on a 10 pF capacitor when the voltage applied to it is 10 kV is
A. 100 μC
B. 0.1 C
C. 0.1 μC
D. 0.01 μC
49. Four 2 μF capacitors are connected in parallel. The equivalent capacitance is:
A. 8 μF
B. 0.5 μF
C. 2 μF
D. 6 μF
50. Four 2 μF capacitors are connected in series. The equivalent capacitance is:
A. 8 μF
B. 0.5 μF
C. 2 μF
D. 6 μF
51. State which of the following is false. The capacitance of a capacitor
A. is proportional to the cross-sectional area of the plates
B. is proportional to the distance between the plates
C. depends on the number of plates
D. is proportional to the relative permittivity of the dielectric
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