Identical 4.0-C charges are placed on the y axis at y = 4.0 m. Point A is on the x axis at x = +3.0 m. Determine the electric potential of point A (relative to zero at the origin).
a. 4.5 kV
b. 2.7 kV
c. 1.8 kV
d. 3.6 kV
e. 14 kV
[Ques. 2] A +4.0-C charge is placed on the x axis at x = +3.0 m, and a 2.0-C charge is located on the y axis at y = 1.0 m. Point A is on the y axis at y = +4.0 m. Determine the electric potential at point A (relative to zero at the origin).
a. 6.0 kV
b. 8.4 kV
c. 9.6 kV
d. 4.8 kV
e. 3.6 kV
[Ques. 3] Identical 2.0-C charges are located on the vertices of a square with sides that are 2.0 m in length. Determine the electric potential (relative to zero at infinity) at the center of the square.
a. 38 kV
b. 51 kV
c. 76 kV
d. 64 kV
e. 13 kV
[Ques. 4] Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite corners of a 60-cm 80-cm rectangle. If point A is the corner of this rectangle nearest the positive charge and point B is located at the intersection of the diagonals of the rectangle, determine the potential difference, VB VA.
a. 47 V
b. +94 V
c. zero
d. 94 V
e. +47 V
[Ques. 5] Three charged particles are positioned in the xy plane: a 50-nC charge at y = 6 m on the y axis, a 80-nC charge at x = 4 m on the x axis, and a 70-nc charge at y = 6 m on the y axis. What is the electric potential (relative to a zero at infinity) at the point x = 8 m on the x axis?
a. +81 V
b. +48 V
c. +5.8 V
d. 72 V
e. 18 V
[Ques. 6] An alpha particle (m = 6.7 1027 kg, q = +3.2 1019 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference VA VB.
a. +4.2 V
b. 4.2 V
c. 9.4 V
d. +9.4 V
e. 8.4 V
[Ques. 7] A particle (m = 2.0 g, q = 5.0 C) has a speed of 30 m/s at point A and moves (with only electric forces acting on it) to point B where its speed is 80 m/s. Determine the electric potential difference VA VB.
a. 2.2 kV
b. +1.1 kV
c. 1.1 kV
d. +2.2 kV
e. +1.3 kV
[Ques. 8] A proton (m = 1.7 1027 kg, q = +1.6 1019 C) starts from rest at point A and has a speed of 40 km/s at point B. Only electric forces act on it during this motion. Determine the electric potential difference VB VA.
a. +8.5 V
b. 8.5 V
c. 4.8 V
d. +4.8 V
e. 17 V
[Ques. 9] An electron (m = 9.1 1031 kg, q = 1.6 1019 C) starts from rest at point A and has a speed of 5.0 106 m/s at point B. Only electric forces act on it during this motion. Determine the electric potential difference VA VB.
a. 71 V
b. +71 V
c. 26 V
d. +26 V
e. 140 V
[Ques. 10] What is the speed of a proton that has been accelerated from rest through a potential difference of 4.0 kV?
a. 1.1 106 m/s
b. 9.8 105 m/s
c. 8.8 105 m/s
d. 1.2 106 m/s
e. 6.2 105 m/s
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