MEDIUM
12th CBSE
IMPORTANT
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If two charged conductors are touched mutually and then separated, prove that the charges on them will be divided in the ratio of their capacitances.
Important Questions on Electrostatic Potential and Capacitance
MEDIUM
12th CBSE
IMPORTANT
Two capacitors with capacity and are charged to potential and respectively and then connected in parallel. Calculate the common potential across the combination, the charge on each capacitor, the electrostatic energy stored in the system and the change in the electrostatic energy from its initial value.
MEDIUM
12th CBSE
IMPORTANT
Explain why the polarization of a dielectric reduces the electric field inside the dielectric. Hence define dielectric constant.
EASY
12th CBSE
IMPORTANT
Define ‘dielectric constant’ of a medium. Briefly explain why the capacitance of a parallel plate capacitor increases, on introducing a dielectric medium between the plates.
EASY
12th CBSE
IMPORTANT
What is dielectric polarisation?
EASY
12th CBSE
IMPORTANT
Two dielectric slabs of dielectric constants and are filled in between the two plates, each of area , of the parallel plate capacitor as shown in Figure. Find the net capacitance of the capacitor.
EASY
12th CBSE
IMPORTANT
A parallel plate capacitor of capacitance is charged to a potential . It is then connected to another uncharged capacitor having the same capacitance. Find out the ratio of the energy stored in the combined system to that stored initially in the single capacitor.
MEDIUM
12th CBSE
IMPORTANT
Explain, using suitable diagrams, the difference in the behavior of a (i) conductor and (ii) dielectric in the presence of the external electric field. Define the term polarization of a dielectric and write its relationship with susceptibility.
EASY
12th CBSE
IMPORTANT
A capacitor is charged with a battery and then its plate separation is increased without disconnecting the battery. What will be the change in the charge stored in the capacitor.
