الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Lectures in General Physics
[4] Each capacitor in the combination shown in Figure 2 has a breakdown
voltage of 19.0V.
24uF
24uF
24uF
12uF
24uF
Figure 2
What is the breakdown voltage of the combination?
a. 57.0 V
b. 28.5 V
c. 95.0 V
d. 19.0 V
[5] When a potential difference of 190 V is applied to the plates of a parallel
plate capacitor, the plates carry a surface charge density of 20.0 nC/cm 2 .
What is the spacing between the plates?
a. 8.41 m
b. 0.119 m
c. 0.429 m
d. 2.3 3 m
[6] A parallel plate capacitor is constructed using a dielectric material whose
dielectric constant is 4.00 and whose dielectric strength is 2.50 10 8 V/m.
The desired capacitance is 0.450F, and the capacitor must withstand a
maximum potential difference of 4000V. Find the minimum area of the
capacitor plates.
a. 3.25 m 2
b. 0.203 m 2
c. 0.795 m 2
d. 0.814 m 2
Dr. Hazem Falah Sakeek 221