Electrostatics Question 339
Question: Two parallel plates have equal and opposite charge. When the space between them is evacuated, the electric field between the plates is $ 2\times 10^{5}V/m $ . When the space is filled with dielectric, the electric field becomes$ 1\times 10^{5}V/m $ . The dielectric constant of the dielectric material [MP PET 1989]
Options:
A) 1/2
B) 1
C) 2
D) 3
Show Answer
Answer:
Correct Answer: C
Solution:
$ K=\frac{{E _{\text{without dielectric }}}}{{E _{\text{with dielectric}}}}=\frac{2\times 10^{5}}{1\times 10^{5}}=2 $
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