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Two parallel plates have equal and opposite charge. When the space between them is evacuated the electric field between the plates is 2×105V/m . When the space is filled with dielectric the electric field becomes 1×105  V/m . The dielectric constant of the dielectric material is

a
1/2
b
1
c
2
d
3

detailed solution

Correct option is C

K=Ewithout  dielectricEwith  dielectric=2×1051×105=2

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