BLANK – Practice
Electric Dipole & Colliding Electrical Particles
Problem 1
An electric dipole is placed in an electric field as shown
in the picture on the right hand side where you can find
all the pertinent information you may need.
a) What are magnitude and direction of the torque on
the electric dipole? In the picture, clearly draw and
label the vector representing the torque.
b) What is the electric potential energy of the electric dipole?
Problem 2
An electric dipole is placed in an electric field as shown
in the picture on the right hand side where you can find
all the pertinent information you may need.
a) What are magnitude and direction of the torque on
the electric dipole? In the picture, clearly draw and
label the vector representing the torque.
b) If the dipole is allowed to rotate away from the position in the picture, what will the rotational
kinetic energy of the dipole be as it goes through the stable equilibrium position?
Dr. Cereghetti – PHY 13 – El. Dip. & Coll. El. Part. BLANK – Practice – page !1
Q1 = −4µC
y
Q2 = +4µC
x
E = 500N/C
60º
0.3m
E = 600N/C
–
+
40º
- 2×10-6C
2×10-6C
l = 10-5m
