#8 need help please explain thank you 5. Ii an lestric poten by te l2, 6. Y 7. T
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#8 need help please explain thank you
5. Ii an lestric poten by te l2, 6. Y 7. Two pendulums with a mass of 10 g and length 10 cm each hang at an an|e l5° from the vertical line separating then. equation: 'r e2 +2ry+2), then what three syqatliona describes the components of the eloctric field? (y-1) ou have fancy resistors made out of gold (which has a tumperature soefficient of nesistity of 0.003713. By how muh does your temperature change if your initial resistance increases hy a factor of 2? (a) What can you say about the sign of the charges on the two pendulums? (b) What is the magnitude of the charge on each pendulum? 8. Consider a square with sides of length 5em where each of the four vertices carry a change. The left vertiors each carry +6.0pC of charge, while the right vertices each carry -3.0 C of charge. (a) What is the magnitude and direction of the electric field at the center of the square ib) If the center of the square contained an electron, what would the force be of the changed vertices on the dectron? 9. Calculate the equivalent capacitance for the following circuit using 3 F capacitors nmssign for the capacitance of a parallel plate capacitor, assuming a uniform charge distribution, a, and separatedExplanation / Answer
8. consider square of side a = 5 cm
4 vertices carry a charge
left vertices, q = 6 uC each
right vertices ,q' = -3 uC each
a. at the center of the square
magnitude of electric field = 4kq*cos(45)/a^2 - 4kq'*cos(45)/a^2
E = 4k*9*10^-6*cos(45)/a^2 = 91437.392 V/m to the right
b. if there was an electron in this position
e = -1.9*10^-19 C
F = eE = 146299.8272*10^-19 N ( to the left)
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