Question

If a particle of charge $-0.2mC$ were placed at a certain location in an electric field, the magnitude of the electric force it would feel is $1N$. Find out the magnitude of the electric field at this location? $(1mC={10}^{-3}C)$

• A. $2,000N/C$
• B. $5,000N/C$
• C. $20,000N/C$
• D. $50,000N/C$
• E. $500,000N/C$

Answer 1

Answer: (B)

$5,000N/C$

Electric force, $F=qE$

So, magnitude of field $|E|=|\frac{F}{q}|=|\frac{1}{-0.2\times {10}^{-3}}|=5000N/C$