Question

Electric potential difference EM 89 B. Shown at right are four points near a positively charged rod. Points W and Y are equidistant from the rod, as are points X and Z. A charged particle with mass m. = 3 X 10 kg is released from rest at point W and later is observed to pass point X 1. Is the particle positively or negatively charged? Explain. w х O 2. Suppose that the magnitude of the charge on the particle is 2 x 10°C and that the speed of the particle is 40 m/s as it passes point X. Find the change in kinetic energy of the particle as it travels from point W to point X. a. b. Find the work done on the particle by the electric field between point W and point X. (Hint: See part D of section I.) c. Find the electric potential difference between point W and point X. d. If the same particle were released from point Y, would its speed as it passes point Z be greater than, less than or equal to 40 m/s? Explain. 3. Suppose that a second particle with the same mass as the first but nine times the charge (i.e., 18 X 10C) were released from rest at point W. a. Would the electric potential difference between points W and X change? If so, how, if not, why not? b. Would the speed of the second particle as it passes point X be greater than, less than, or equal to the speed of the first particle as it passed point X? Explain.

Would appreciate your help with these problems. Thank you

Answer 1

Aus B z. 0 13 Х 1. The charge particle is positively charged as it is repelled a positively charged rod, i.e. why the charge particle rod from w' to by mones way from the 2. 2 = 2x1066 Vx= 40m/s, as the charge particle passes through x a AKE = K Ex-KEw = _ _ m V x 1 m. Vw 2 5x 3810**(40)*=, x mox o AN

el the same same & hence the speed of particle remains as 40m/s. As the difference in the work done by electric electric fore is same so does potensial the change in Kinetic Energy.