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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× 105 V/m. When the space is filled with dielectric, the electric field becomes 1× 105 V/m. The dielectric constant of a dielectric material is:
  1. 1/2
  2. 1
  3. 2
  4. 3

A
3
B
1/2
C
1
D
2
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