Correct Answer: Option B

Explanation

  E = \(\frac{V}{d}\)

• E is the electric field (in volts per meter, V/m),
• V is the potential difference (in volts, V),
• d is the distance between the two points (in meters, m)
• Given:  Potential difference V = 10\(^7\) 
• Height d = 4m

That is,   E = \(\frac{10^7}{4} = 2.5\times 10^6 NC^{-1}\)

There is an explanation video available below.

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