Question

If medium between two charges is air, then value of constant k in SI units will be

A 5 × 109 Nm²C-2
B 7 × 109 Nm²C-2
C 8 × 109 Nm²C-2
D 9 × 109 Nm²C-2

Answer & Explanation

Answer: 9 × 109 Nm²C-2

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