Two point charges of magnitude 9 nC and 8 nC are separated by 25.5 cm 004 10.0 p

Question

Two point charges of magnitude 9 nC and 8 nC are separated by 25.5 cm

004 10.0 points Two point charges of magnitude 9 nC and -8 nC are separated by 25.5 cm What is the potential difference between a point infinitely far away and a point midway between the charges? The Coulomb constant is 8.98755 x 109 N·mf/C2 Answer in units of V 005 10.0 points Two charges are located along the a-axis. One has a charge of 6.4 C, and the second has a charge of-3/C. If the electrical potential energy associ- ated with the pair of charges is -0.046 J what is the distance between the charges? The value of the Coulomb constant is 8.98756 x 109 N·m2/C2 and the acceleration due to gravity is 9.81 m/s Answer in units ofm.

Explanation / Answer

004:

at mid point,

V = k q1 / r1 + k q2 /r2

V = (9 x 10^9 x 9 x 10^-9 / (0.255/2)) + (9 x 10^9 x -8 x 10^-9 / (0.255/2))

V = 80 Volt

at very far away, V = 0

PD = 80 - 0 = 80 Volt

005:

PE = k q1 q2 / d

-0.046 = (9 x 10^9) (6.4 x 10^-6)(-3 x 10^-6) / d

d = 3.76 m ....Ans

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