An electric field of 1000 V/m is applied to an electric dipole at angle of 45°. The value of electric dipole moment is 10−29 C.m. What is the potential energy of the electric dipole?
a.
− 9 × 10−20 J
b.
− 7 × 10−27 J
c.
− 10 × 10−29 J
d.
− 20 × 10−18 J
a.
− 9 × 10−20 J
b.
− 7 × 10−27 J
c.
− 10 × 10−29 J
d.
− 20 × 10−18 J
Question ID - 50343 | SaraNextGen Top Answer An electric field of 1000 V/m is applied to an electric dipole at angle of 45°. The value of electric dipole moment is 10−29 C.m. What is the potential energy of the electric dipole?
a.
− 9 × 10−20 J
b.
− 7 × 10−27 J
c.
− 10 × 10−29 J
d.
− 20 × 10−18 J
An electric field of 1000 V/m is applied to an electric dipole at angle of 45°. The value of electric dipole moment is 10−29 C.m. What is the potential energy of the electric dipole?
|
a. |
− 9 × 10−20 J |
b. |
− 7 × 10−27 J |
|
c. |
− 10 × 10−29 J |
d. |
− 20 × 10−18 J |
1 Answer
127 votes
Answer Key / Explanation : (b) -
U = − 
= −PE cos
= − (10−29) (103) cos 45
= −0.707 x 10−26 J
= − 7 x 10−27 J.
127 votes
Answer Link
127