For problem 24.25 part b, calculate the potential at point P in volts using a value...

Question

Question

For problem 24.25 part b, calculate the potential at point P in volts using a value of Q₂ = -5.31 Q₁instead of the value in the stated problem.

Answer 1

Answer #1

Potential at point is given by the equation ,

V = k*total charge /r

(a)

given Q1 = 4.20*10^-12 C

Q2 = -6*Q1 = -6*4.20*10^-12 = -25.2*10^-12

Radius R = 8.20 cm = 0.082 m

potential at the center of the circle ,

V = k*[Q1/r1 + Q2/r2]

r1 = r2 = R

so,

V = 9*10⁹*[(4.20*10^-12 - 25.2*10^-12 )/0.082]

V = 2.30 V

(b)

For the point P

r1 = r2 = sqrt(R² + D²) = 0.105 m

Q2 = -5.31*Q1 = -5.31*4.20*10^-12 = 22.30*10^-12N

V = 9*10⁹*[(4.20*10^-12 - 22.30*10^-12 )/0.105]

V = 1.55 V

Answer 2

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