How does a dipole behave in electric field?
In an electric field a dipole undergoes a torque, tending to rotate so that its axis becomes aligned with the direction of the electric field. The electric dipole moment, a vector, is directed along the line from negative charge toward positive charge.
What is a dipole in an electric field?
A dipole is an arrangement of two charges bearing the same magnitude but an opposite polarity separated by some distance. So, if there are two charges and we join the center of these two charges with an imaginary line and the distance between them is ‘2a’, then the dipole moment is: →p=q(2→a)
What is the force on a dipole of dipole moment?
The total force on the dipole is the sum of the forces on the individual charges. Unless the electric field at the location r + d of the positive charge differs from that at the location r of the negative charge, the separate contributions cancel.
What is the force between two dipoles?
A dipole is separation of two opposite charges and it is quantified by electric dipole moment and is denoted by p. Angle between the dipole and electric field is 180 degrees. F is positive, so it is a repulsive force.
What is the force on the dipole?
The net force acting on a dipole placed in a uniform electric field is zero. The forces on the two charges constituting the dipole are equal and opposite. Hence, the net force is zero.
What is dipole field?
Dipole fields, or an electric field between two charges of the same but opposite strength, work in a similar way to the poles on the rock. When two charges with equal but opposite charges are placed near each other, a field with curved lines is created.
How do you find the force of a dipole?
The formula of the force exerted on an electric dipole by non-uniform electric field. When an electric dipole of moment P is located in a non-uniform electric field E, there is an net force exerted on it. However, the formula of the force in some books is read F=∇(P·E), while in other books, it is F=(P·∇)E.
What do you mean by electric dipole and electric dipole moment?
An electric dipole is a separation of positive and negative charges. The electric dipole moment is the product of the magnitude of the charge and the distance between the centres of positive and negative charges.
What is an electric dipole give its example?
An electric dipole is defined as a couple of opposite charges q and –q separated by a distance d. The midpoint q and –q is called the centre of the dipole. The simplest example of an electric dipole is a pair of electric charges of two opposite signs and equal magnitude separated by distance.
How do you find the force between dipoles?
The force of interaction of two dipoles, if the two dipoles are parallel to each other and placed at distance x apart.
- 3p1p24πε∘x4.
- p1p24πε∘x4.
- p1p24πε∘x4.
- p1p23πε∘x4. Answer.
What is the force on an electric dipole placed in a uniform electric field?
Hence, the electric force on a dipole when it is placed in a uniform electric field is always zero.
How is the dipole of an electric field defined?
The electric dipole moment associated with two equal charges of opposite polarity separated by a distance ‘d ’ is defined as the vector quantity having a magnitude equal to the product of the charge and the distance between the charges and having a direction from the negative to the positive charge along the line between the charges.
How is the electric field and force related?
The Electric Field and force !e electric force on a charge is parallel or antiparallel to the electric “eld at that point ! !e electric force is F=qE points toward charge 2, as shown in Figure 21.13b.
Which is the dipole moment associated with two equal charges?
The electric dipole moment associated with two equal charges of opposite polarity separated by a distance, d is defined as the vector quantity having a magnitude equal to the product of the charge and the distance between the charges and having a direction from the negative to the positive charge along the line between the charges.
How are Eld lines related to the electric field?
The Electric Field !e electric !eldis de”ned at any point in space as the net electric force on a charge, divided by that charge ! Electric “eld lines start at positive charges and end at negative charges ! Electric “eld line density: • High density of “eld lines – large “eld • Low density of “eld lines – small “eld E(r)= F (r)