Figs. 1 and 2 show a dielectric slab being inserted between the plates of one of
ID: 1598085 • Letter: F
Question
Figs. 1 and 2 show a dielectric slab being inserted between the plates of one of two identical capacitors, capacitor 2. Select the correct answer to each of the statements below (enter I for `increases', D for `decreases', or S for `stays the same').
a) In Fig. 2, the potential difference between the plates of capacitor 1 ____ when the dielectric is inserted.
b) In Fig. 2, the charge on capacitor 1 ____ when the dielectric is inserted.
c) In Fig. 2, the capacitance of capacitor 1 ____ when the dielectric is inserted.
d) In Fig. 2, the potential energy stored in capacitor 1 ____ when the dielectric is inserted.
The answer is not SDSD
Figure 1 #1 #2 Figure 2 #1 #2Explanation / Answer
(a) As long as the capacitor is connected to the battery, the potential difference remains the same.
(b) The capacitors are in parallel and the dielectric is inserted in second capacitor. Thus, the charge remains same.
(c) There is no change in the capacitance of the capacitor 1, since dielectric is inserted in second capacitor.
(d) The potential stored in the capacitor 1 is saty remains same, since U = (1/2)CV^2, since there is no change in the capacitance and voltage.
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