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JEE Mains · Physics · STD 12 - 1. Electric charges and fields

\(y=1\, m , 2\, m , 4 \,m , 8\, m \ldots \ldots \ldots \ldots \ldots\) પર \(1 \,\mu C\) વિદ્યૂતભાર મૂકવામાં આવે છે ઉગમબિંદુ પર \(1 \,C\) વિદ્યૂતભાર પર લાગતું બળ \(x \times 10^{3}\, N\) હોય તો \(x=\) .........

  1. A \(9\)
  2. B \(16\)
  3. C \(12\)
  4. D \(24\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(12\)

Step-by-step Solution

Detailed explanation

\(F=k(1 C)(1 \mu C)\left[1+\frac{1}{2^{2}}+\frac{1}{4^{2}}+\frac{1}{8^{2}}+\ldots\right]\) \(=9 \times 10^{3}\left[\frac{1}{1-\frac{1}{4}}\right]=12 \times 10^{3}\, N\)
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