الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Lectures in General Physics
E
E
Figure 8
(a) Determine the speed of the rod after it has traveled 2.00 m. (b)
How does your answer to part (a) change if the electric field is not
perpendicular to the rod?
a. (a) 0.200 m/s; (b) decreases
b. (a) 0.400 m/s; (b) the same
c. (a) 0.400 m/s; (b) decreases
d. (a) 0.200 m/s; (b) increases
[29] A spherical conductor has a radius of 14.0 cm and a charge of 26.0C.
Calculate the electric field and the electric potential at r = 50.0 cm from the
center.
a. 9.35 10 5 N/C, 1.67 mV
b. 1.19 10 7 N/C, 0.468 mV
c. 9.35 10 5 N/C, 0.468 mV
d. 1.19 10 7 N/C, 1.67 mV
[30] How many electrons should be removed from an initially unchanged
spherical conductor of radius 0.200 m to produce a potential of 6.50 kV at
the surface?
a. 1.81 10 11
b. 2.38 10 15
c. 9.04 10 11
d. 1.06 10 15
[31] An ion accelerated through a potential difference of 125 V experiences
an increase in kinetic energy of 9.37 10 -17 J. Calculate the charge on the
ion.
Dr. Hazem Falah Sakeek 119