When $4 \mathrm{C}, \mathrm{Q} C$ and $1 \mathrm{C}$ electrical charges are placed along a straight line of…

When $4 \mathrm{C}, \mathrm{Q} C$ and $1 \mathrm{C}$ electrical charges are placed along a straight line of length ' $l$ ' at 0 , $\frac{l}{2}$ and $l$ respectively. The respective values of $\mathrm{Q}$ so that the net force on $4 \mathrm{C}$ is zero and $1 \mathrm{C}$ is zero separately are (in coulomb)
  1. $-1, \frac{1}{4}$
  2. $\frac{-1}{2}, \frac{-1}{4}$
  3. $\frac{-1}{4},-1$
  4. $\frac{-1}{4}, \frac{-1}{2}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (24 Apr Shift 2)

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