Introducing Epsilon
Trending Questions
Q. The value of electric permittivity of free space is
- 9×109NC2/m2
- 8.85×10−12NM2/C2sec
- 8.85×10−12C2/Nm2
- 9×109C2/Nm2
Q. The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance
- Vacuum is created between two spheres
- Dielectric material is filled between the two spheres
- The space between two spheres is increased
- The earthing of the outer sphere is removed
Q. Dielectric constant of pure water is 81. Its permittivity will be
- 7.12×10−10MKS units
- 8.86×10−12MKS units
- 1.02×1013MKS units
- Cannot be calculated
Q. The intensity of electric field at a point between the plates of a charged capacitor
- Is directly proportional to the distance between the plates
- Is inversely proportional to the distance between the plates
- Is inversely proportional to the square of the distance between the plates
- Does not depend upon the distance between the plates
Q.
Charges Q1 and Q2 are in vacuum initially. Q2 experiences a net force F due to the presence of Q1. They are now placed in a new medium of dielectric constant εrand the relative distance between them is maintained. The new net force experienced by Q2 due to the presence of Q1 is
Fεr
Fεr
F(1+εr)
Electrostatic force does not change with medium
Q. Two point charges q1 and q2 are placed at a distance of 50 m from each other in air, interact with a certain electrostatic force. If the medium is replaced with oil whose relative permittivity is 5, then the interaction force between them is still the same. Now the separation between them is
- 16.6 m
- 25.0 m
- 28.4 m
- 22.3 m
Q. Half of the space between the plates of a parallel plate capacitor is filled with a medium of dielectric constant K parallel to the plates. If initially the capacitance is C, then the new capacitance will be
- (K+1)C2
- KC
- KCK+1
- 2KCK+1
Q. The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance
- Vacuum is created between two spheres
- Dielectric material is filled between the two spheres
- The space between two spheres is increased
- The earthing of the outer sphere is removed
Q. The capacitor of an oscillatory LC circuit is enclosed in a container. When the container is empty, the frequency is 10 kHz. When the container is filled with a gas, the frequency changes by 50 Hz. The dielectric constant of the gas is -
- 3.01
- 5.01
- 1.01
- 2.01