Statement I: When air between the plates of a parallel plate condenser is replaced by an insulating medium of dielectric constant, its capacity decreases.
Statement II: When dielectric material is inserted between the plates of parallel plate capacitor, then electric field intensity between the plates is reduced.
In the light of the above statements, choose the most appropriate answer from the options given below.
Text Solution
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Statement I is incorrect but Statement II is correct.
The capacity of a parallel plate condenser is,
Electric field intensity becomes 
times, therefore potential V also becomes 
times.
Hence, from above equation capacity becomes K times. Thus electric field decreases and capacitance increases.
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