Electric Charges and Fields. How does a torque affect the dipole in an electric field? The torque tends to align the dipole in the direction of the electric field. … The “graininess” of charge is lost and it appears continuous and therefore quantisation of charge becomes insignificant.
What is the effect of torque in an electric field?
Answer: Even though the two forces on the ends of the dipole cancel as free vectors, they act at different points. This means that they give rise to a torque on dipole. The turning effect of this torque is to reduce the angle q towards zero, and make the dipole moment vector become parallel to the field.
When an electric field is applied to a dipole?
In the presence of a uniform external electric field, the dipole aligns with the electric field (the direction from the negative charge to the positive charge being the same as that of the electric field) due to electric forces that are equal in magnitude and opposite in direction acting on the charges, and the net …
How do you find the electric field from a dipole?
The electric dipole moment is the product of either of two charges (ignoring the sign) and the distance between them.
- A dipole is an arrangement of two charges bearing the same magnitude but an opposite polarity separated by some distance.
- q = charge.
When an electric dipole is held at an angle in a uniform electric field?
1) the forces experienced by the 2 charges constituting the electric dipole when placed in an uniform external electric field are equal and opposite in nature, the net force on the dipole is zero. No torque act on the dipole when the moment of electric dipole is parallel to the electric field.
What is the relationship between distance and electric field for a dipole?
The electric dipole moment for a pair of opposite charges of magnitude q is defined as the magnitude of the charge times the distance between them and the defined direction is toward the positive charge.
What is the torque on a dipole in a uniform electric field?
An electric dipole in an electric field that is external is subjected to a torque written as τ = pE sin θ where symbol θ is the angle which is between p and E. The torque tends to align the moment of the dipole p in the direction of E.