Question

Two parallel large thin metal sheets have equal surface charge densities $(\sigma =26.4\times {10}^{-12}c/m^2)$ of opposite signs.
The electric field between these sheets is:

• A. $1.5N/C$
• B. $1.5\times {10}^{-10}N/C$
• C. $3N/C$
• D. $3\times {10}^{-10}N/C$

Answer 1

The correct option is C $3N/C$

The electric field between two parallel large plates is $E=\frac{\sigma }{{ϵ}_0}=\frac{26.4\times {10}^{-12}}{8.85\times {10}^{-12}}=2.98\sim 3N/C$