Answer to Question #94950 in Electricity and Magnetism for abdul

Question

In the figure the electric field lines on the left have twice the separation as those on the right. (a) If the magnitude of the field at A is 47 N/C, what is the magnitude of the force on a proton at A? (b) What is the magnitude of the field at B?

Answer 1

a)

$$F=qE=(1.60\cdot 10^{-19})(47)=7.52\cdot 10^{-18}N$$

b) In the figure the electric field lines on the left (B) have twice the separation as those on the right (A).

$$E_B=0.5E_A=0.5(47)=23.5\frac{N}{C}$$