TWO DIFFERENT PROBLEMS
PROBLEM 1
The electric potential at a position located a distance of 20.4 mm from a positive point charge of 7.60×10-9C and 15.4 mm from a second point charge is 1.34 kV. Calculate the value of the second charge.
PROBLEM 2
A parallel plate capacitor with plate separation d is connected
to a battery. The capacitor is fully charged to Q Coulombs and a
voltage of V. (C is the capacitance and U is the stored energy.)
Answer the following questions regarding the capacitor charged by a
battery. For each statement below, select True or False.
True False After being disconnected from the battery,
inserting a dielectric with κ will increase C.
True False After being disconnected from the battery,
increasing d increases V.
True False After being disconnected from the battery,
decreasing d increases C.
True False After being disconnected from the battery,
inserting a dielectric with κ will increase U.
True False With the capacitor connected to the battery,
decreasing d increases U.
True False After being disconnected from the battery,
inserting a dielectric with κ will decrease V.
Please clearly show which ones are true and which ones are false.
1)
Potential, V = kq1/(0.0204) + kq2/(0.0154)
1340 = (9 x 10^9 x 7.6 x 10^-9/0.0204) + (9 x 10^9 x q2/0.0154)
Charge, q2 = - 3.44 x 10^-9 C
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According to the HOMEWORKLIB RULES I can answer one question at a time so please post other questions seperately ....
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