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What happens to a dielectric material when it is placed in an electric field?
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Important Questions on Electrostatic Potential, Potential Energy and Capacitance
EASY
Which of the following option is the pair of polar molecules?
EASY
The unit of polarizabity of the molecule is _____
MEDIUM
The dimensional formula of Polarization is _____
EASY
Polar molecules are the molecules:
EASY
Which of the statements is false in the case of polar molecules?
EASY
For a polar molecule, which of the following statements is true?
EASY
If dielectric constant and dielectric strength be denoted by and respectively, then a material suitable for use as a dielectric in a capacitor must have
EASY
A voltmeter reads 4 V when connected parallel plate capacitor with air as a dielectric. When a dielectric slab is introduced between plates for the same configuration, voltmeter reads 2 V. What is the dielectric constant of the material?
EASY
Mark the correct statements.
EASY
In the figure, a solid sphere of the radius is concentric with a spherical conducting shell of inner radius and outer radius . The sphere has a net uniform charge , the shell has a net charge . What is the net charge on the inner surface of the shell?
HARD
The electric fields in the dielectric slab is
MEDIUM
Which one is polar molecule among the following?
EASY
The constant in Coulomb’s law depends on
MEDIUM
An electron of mass , initially at rest, moves through a certain distance in an uniform electric field in time . A proton of mass , also, initially at rest, takes time to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio is nearly equal to
EASY
Guess a possible reason why water has a much greater dielectric constant than say, mica
MEDIUM
Assertion: If a conducting medium is placed between two charges, then the electric force between them becomes zero.
Reason: Reduction in a force due to introduced conductor is proportional to its dielectric constant.
EASY
The dielectric constant of a metal is
HARD
Two charges are placed a certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges ?
EASY
Assertion: For a system of two point charges, the ratio of the magnitude of electrostatic force experienced by each charge depends upon the medium between the point charges.
Reason: The magnitude of the electrostatic force between two point charges and separated by a distance is , if the charges are placed in a medium of dielectric constant .
