Question

Two parallel plates have equal and opposite charge. When the space between them is evacuated, the electric field between the plates is $2 \times 10^5 \, Vm^{ - 1}$. When the space is filled with dielectric thel electric field becomes $1 \times 10^5 Vm^{ -1}$ . The dielectric constant of dielectric material is

• A. 44563
• B. 1
• C. 2
• D. 3

Answer 1

Answer: (C)

2

Answer 2

K = $\frac{ E_{ without \, dielectric }}{ E_{ with \, dielectric}} = \frac{ 2 \times 10^5 }{ 1 \times 10^5 }$ = 2