1. It takes 2.0 J of work to move a 16 nC charge from point A to B. It takes -5.
ID: 1653204 • Letter: 1
Question
1. It takes 2.0 J of work to move a 16 nC charge from point A to B. It takes -5.5 J of work to move the charge from C to B.What is the potential difference VCVA?
2.Two 2.20 cm × 2.20 cm plates that form a parallel-plate capacitor are charged to ± 0.708 nC .
a.)what is the electric field strength inside the capacitor if the spacing is between the plates is 1.40 mm
b.)What is potential difference across the capacitor if the spacing between the plates is 1.40 mm ?
c.)What is the electric field strength inside the capacitor if the spacing between the plates is 2.80 mm ?
d.)What is the potential difference across the capacitor if the spacing between the plates is 2.80 mm ?
Explanation / Answer
solving first question
Q1
Let the potential difference is V volts
net work done=QV
net work done in A to B =2 uJ
Vb-Va=2uJ/Q=125 V
Work done from C to B=-5.5
Vb-Vc=-343.75 Volta
V=Vc-Vb+Vb-Va=468.75 volts
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