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dielectric is introduced between the plates of a capacitor kept at a constant potential difference. The capacitance of the capacitor-
- a)Increases
- b)Decreases
- c)Remains the same
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
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dielectric is introduced between the plates of a capacitor kept at a ...
Suppose +Q is the charge on one plate and –Q is charge on the second plate. Bring a rectangular slab made up of conducting material between the plates of the capacitor. The thickness of the slab must be less than the distance between the plates of the capacitor. When the electric field will be applied then polarization of molecules will be started. The polarization will take place in the same direction as that of the electric field. Consider a vector that must be polarized, name it as P. The polarization vector must be in the direction of the electric field Eo. Then this vector will start its functioning and will produce an electric field Ep in the opposite direction to that of Eo. The net electric field in the circuit is shown by the figure.
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Hence, the correct option is (A)
Most Upvoted Answer
dielectric is introduced between the plates of a capacitor kept at a ...
Effect of Dielectric on Capacitance:
Dielectric material increases the capacitance of a capacitor. This phenomenon can be explained by the polarization of the dielectric material when placed between the plates of a capacitor.
Polarization of Dielectric:
- When a dielectric material is introduced between the plates of a capacitor, the electric field within the dielectric causes the alignment of the molecules in the material.
- This alignment creates a net dipole moment in the dielectric material, which in turn produces an electric field opposing the external electric field.
- As a result, the effective electric field between the plates of the capacitor decreases, leading to an increase in capacitance.
Mathematical Representation:
- The capacitance of a capacitor with a dielectric material can be expressed as C' = κ * C, where C' is the new capacitance, C is the original capacitance, and κ is the dielectric constant of the material.
- The dielectric constant is a measure of how much the capacitance of a capacitor increases when a dielectric material is introduced.
Conclusion:
- In summary, the introduction of a dielectric material between the plates of a capacitor increases the capacitance by reducing the effective electric field and allowing for more charge storage.
- Therefore, the correct answer is option 'A' - Increases.
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dielectric is introduced between the plates of a capacitor kept at a constant potential difference. The capacitance of the capacitor-a)Increasesb)Decreasesc)Remains the samed)None of the aboveCorrect answer is option 'A'. Can you explain this answer?
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