An infinite plane of charge with 
is tilted at a 45° angle to the vertical direction as shown below. The potential difference, VB?VA, in volts, between points A and B, a 4.50 m distance apart, is
?
?
A. ?7.06.
B. ?9.98.
C. ?14.11.
D. +7.06.
E. +9.98.
Answer: B
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