Question

A large metal plate of area 1.0 m² is placed in electric field. The magnitude E of the electric field is 5.5 N/C. What is the magnitude of charge on the plate?

Options

• 9.7 pC 

• 97 pC

• 48.6 pC

• 4.88 pC 

Answer 1

97 pC

Explanation:

E = `sigma/(2epsilon_0) = "q" /(2"A"epsilon_0)`

q = `2"A"epsilon_0 = 2 xx 1 xx 5.5 xx 8.55 xx 10^-12`

= `11 xx 8.55 xx 10^-12`

= `97.35 xx 10^-12` C

= 97 pC