PHIL 130 Lecture 9: PHIL 130 - Lecture 9 (2)

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3. –/4 points Notes Question: SerCP8 15.P.024. .Question partPoints Submissions 1 2 3 4
0/1 0/1 0/1 0/1
0/5 0/5 0/5 0/5
Total 0/4 ...
(a) Three point charges, A = 2.2 µC, B = 7.5 µC, and C = -3.9 µC,are located at the corners of an equilateral triangle as in thefigure above. Find the magnitude and direction of the electricfield at the position of the 2.2 µC charge.
magnitude 1 N/C
direction 2° (counterclockwise from the +x-axis)

(b) How would the electric field at that point be affected if thecharge there were doubled?

3
The magnitude of the field would be halved.
The field would be unchanged.
The magnitude of the field would double.
The magnitude of the field would quadruple.
.

(c) Would the magnitude of the electric force be affected?

4
no
yes
.

(a) If there are 76 turnson the primary winding, howmany turns are required on thesecondary?
1
(b) If a load resistor across the secondary draws a current of1.5A, what is the current in the primary, assumingidealconditions?
2 A

need some help on this, not sure what todo.thanks