y, cm Two +5 nC point charges 7 are on the x-axis, one at the origin and the other at x = 8 cm. Find the potential at: (a) Point P, on the x-axis at x = 4 cm and (b) Point P2 on the y-axis at y = 6 cm . 6 P2 4 10 cm 1 = 5 nC 92 = 5 nC 1 P1 1 2 3 4 5 6 7 8 x, cm 9. 3.

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4G
7:55 | 11,4KB/d L
91
2-1-Poten..ik-A-clear
Infinite line
7
EXAMPLE 3
у, ст
Two +5 nC point charges
are on the x-axis, one at the
origin and the other at x =
8 cm. Find the potential at:
(a) Point P, on the x-axis at
x = 4 cm and
(b) Point P2 on the y-axis at
y = 6 cm .
7
6
P2
4
10 cm
3
91 = 5 nC
92 = 5 nC
1
%3D
P1
(+)
x, cm
1
2
3
4
6 7 8
8
EXAMPLE 4
Four point charges are placed at the four corners of a square that is 30 cm on
each side. Find the potential at the center of the square if
(a) The four charges are each +2.0 µC
(b) Two of the four charges are +2.0 µC and two are –
2.0 μC.
9
EXAMPLE 5
The charge at A is 200 pC, while the charge at B is 100 pC.
(a) Find the absolute potentials at points C and D.
(b) How much work must be done to transfer a charge of
500 µC from point C to point D?
+ 200 pC
D
C
- 100 pC
B
20 cm
60 cm
20 cm
10
Transcribed Image Text:4G 7:55 | 11,4KB/d L 91 2-1-Poten..ik-A-clear Infinite line 7 EXAMPLE 3 у, ст Two +5 nC point charges are on the x-axis, one at the origin and the other at x = 8 cm. Find the potential at: (a) Point P, on the x-axis at x = 4 cm and (b) Point P2 on the y-axis at y = 6 cm . 7 6 P2 4 10 cm 3 91 = 5 nC 92 = 5 nC 1 %3D P1 (+) x, cm 1 2 3 4 6 7 8 8 EXAMPLE 4 Four point charges are placed at the four corners of a square that is 30 cm on each side. Find the potential at the center of the square if (a) The four charges are each +2.0 µC (b) Two of the four charges are +2.0 µC and two are – 2.0 μC. 9 EXAMPLE 5 The charge at A is 200 pC, while the charge at B is 100 pC. (a) Find the absolute potentials at points C and D. (b) How much work must be done to transfer a charge of 500 µC from point C to point D? + 200 pC D C - 100 pC B 20 cm 60 cm 20 cm 10
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