Question

Two unlike charges of the same magnitude Q are placed at a distance d. The intensity of the electric field at the middle point in the line joining the two charge is –

• A. Zero
• B. $\frac{8Q}{4\pi\varepsilon_{0}d^{2}}$
• C. $\frac{6Q}{4\pi\varepsilon_{0}d^{2}}$
• D. $\frac{4Q}{4\pi\varepsilon_{0}d^{2}}$

Answer 1

Answer: (B)

$\frac{8Q}{4\pi\varepsilon_{0}d^{2}}$

Answer 2

E_Net = E₁ + E₂ = $\frac { \mathrm { kQ } } { \left( \frac { \mathrm { d } } { 2 } \right) ^ { 2 } }$ + $\frac { \mathrm { kQ } } { \left( \frac { \mathrm { d } } { 2 } \right) ^ { 2 } }$ =