الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Multiple choice question for part 1
a. 0.386 g
b. 0.669 g
c. 2.59 g
d. 1.49 g
[7] Four identical point charges (q = +14.0 C) are located on the corners of
a rectangle as shown in Figure 4.
q
q
W
q
L
Figure 4
q
The dimensions of the rectangle are L = 55.0 cm and W= 13.0 cm.
Calculate the magnitude and direction of the net electric force exerted on the
charge at the lower left corner by the other three charges. (Call the lower left
corner of the rectangle the origin.)
a. 106 mN @ 264 o
b. 7.58 mN @ 13.3 o
c. 7.58 mN @ 84.0 o
d. 106 mN @ 193 o
[8] An electron and proton are each placed at rest in an electric field of 720
N/C. Calculate the speed of each particle 44.0 ns after being released.
a. v e = 1.27 10 6 m/S, v p = 6.90 10 3 m/s
b. v e = 5.56 10 6 m/S, v p = 3.04 10 3
m/s
c. v e . = 1.27 10 14 m/S, v p = 6.90 10 10 m/s
d. v e = 3.04 10 3 m/S, v p = 5.56 10 6 m/s
[9] Three point charges are arranged as shown in Figure 5.
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