Vector EC d. The electric field at that point is zero Q 2. Three resistors are c
ID: 2287372 • Letter: V
Question
Vector EC d. The electric field at that point is zero Q 2. Three resistors are connected in series and each carries currents labeled D1, I2 and 13 respectively. Which of the following expresses the value of the total current IT in the system made up of the three resistors in series? ITE 13 b. IT (1/II 1/12 1/13) 3. Identical point charges (+50 AC) are placed at the corners of a square with sides of 2.0-m length. How much external energy is required to bring a fifth identical charge from infinity to the geometric center of the square? CAC 10 6 C, k 9 x 10 Nm2/C2 (c) 64 J (a). 41 J (b). 16 J (d). 10 J (e). 80 J Part 2: Solve 4 out of 5 problems, 21 points each, show all work to get credit 1. A point charge of Q 2.0 C is located at the origin of a coordinate system and a second point charge of Q2 4.0 C is at x 2.0 m. At what point on the x axis is the electrical potential zero?Explanation / Answer
2.)
In a Series Circuit ,same current flows through all resistors i.e
IT=I1=I2=I3
3)
Distance from each charge to the Center is
r=sqrt[(2/2)2+(2/2)2]=1.414 m
Work done in moving fifth charge from infinity to center is
W=U1+U2+U3+U4=KQ2/r+KQ2?/r+KQ2?/r+KQ2?/r
W=4*K*Q2/r =4*(9*109)(50*10-6)2/sqrt(2)
W=64 J
1)
Let X be the distance where electric potential is zero
V1=V2
KQ1/r1=KQ2/r2
Q1/r1=Q2/r2
-2/x=4/(2+x)
-4+2x=4
2x=8
x=4 m
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