A uniform electric field with a magnitude of 5550N/C points in the positive x di

Question

A uniform electric field with a magnitude of 5550N/C points in the positive x direction.

A. Find the change in electric potential energy when a +18.0-?C
charge is moved 4.50cm in the positive x direction. ?U =_____J

B. Find the change in electric potential energy when a +18.0-?C
charge is moved 4.50cm in the negative x direction  ?U =_____J

C.

Find the change in electric potential energy when a +18.0-?C
charge is moved 4.50cm in the positive y direction.

Express your answer using one significant figure. ?U =_____J

Explanation / Answer

du = Q dV = q E dx = 18.0E-6*5550*4.5E-2= 4.5E-3 J

b) now - previous value

so -4.5E-3 J

c) not moving in direction of field so dU = 0

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