Imagine a single charge q placed on one corner of a square, and that the electric field at the center of the square is F/q. If additional equal charges are placed on the other three corners,

the electric field at the center of the square due to these four equal charges is
A) F/q.
B) 4F/q.
C) F/(2q).
D) F/(4q).
E) none of the above


Answer: E

Physics & Space Science

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The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III

?
The object’s velocity is zero in region(s)

a.
I.
b.
II.

c.
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The graphs below show a voltage phasor at different instances of time. Which voltage phasor shows the instantaneous value of the voltage with the largest magnitude?

a.


b.


c.


d.

Physics & Space Science