Part A What is the electric field at point 1 in (Figure 1) ? Give your answer in
ID: 1636271 • Letter: P
Question
Part A
What is the electric field at point 1 in (Figure 1) ? Give your answer in component form. Assume that a = 3.5 cm and b = 4.4 cm.
Enter the x and y components of the electric field separated by a comma.
Part B
What is the electric field at point 2 in the figure? Give your answer in component form.
Enter the x and y components of the electric field separated by a comma.
Part C
What is the electric field at point 3 in the figure? Give your answer in component form.
Enter the x and y components of the electric field separated by a comma.
10 nCExplanation / Answer
Magnitude of electric field due to point charge at distance r is given as
E = k q / r^2
and direction is towards the charge for negative point charge.
(A) E = (9 x 10^9) (10 x 10^-9) / 0.035^2 (- j)
E = - 7.35 x 10^4 j N/C
Ans: (0 , - 7.35 x 10^4) N/C
(B) E = ((9 x 10^9)(10 x 10^-9) / (0.035^2 + 0.044^2)) ( -0.044/sqrt(0.044^2 + 0.035^2)i - 0.035 / sqrt(0.035^2 + 0.044^2)j )
E = - 2.23 x 10^4 i - 1.77 x 10^4 j N/C
Ans: (-2.23 x 10^4, -1.77 x 10^4 ) N/C
(C) E = (9 x 10^9) (10 x 10^-9) / 0.044^2 (-i)
E = - 4.65 x 10^4 N/C i
Ans: (-4.65 x 10^4 , 0 )