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An infinite line of charge has a linear charge density of $10^{-7} C m^{-1}$. The magnitude of the force acting on a charge $6.4 × 10^{-19} C$ kept at a distance of 8 cm from the line of charge is |
$7.2 × 10^{-15} N$ $7.2 × 10^{-17} N$ $7.2 × 10^{-21} N$ $1.44 × 10^{-14} N$ |
$1.44 × 10^{-14} N$ |
The correct answer is Option (4) → $1.44 × 10^{-14} N$ |
