What is the direction of electric field line?
These pattern of lines, sometimes referred to as electric field lines, point in the direction that a positive test charge would accelerate if placed upon the line. As such, the lines are directed away from positively charged source charges and toward negatively charged source charges.
Does current flow in the direction of the electric field?
The electric field direction within a circuit is by definition the direction that positive test charges are pushed. Thus, these negatively charged electrons move in the direction opposite the electric field. The direction of an electric current is by convention the direction in which a positive charge would move.
What happens to a dipole in a uniform electric field?
When an electric dipole is placed in a uniform electric field, it experiences. An electric dipole placed in uniform electric field experiences a torque which align the dipole parallel to the direction of the electric field with zero net force.
How does an electric dipole behave in an electric field?
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 does the torque affect the dipole in an electric field?
The torque tends to align the dipole in the direction of the electric field. An electric dipole with dipole moment 4 x 10–9 C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 x 104 NC–1.
What is the torque acting on an electric dipole?
Dipole in a Uniform External Field Consider an electric dipole consisting of charges − q and + q and of length 2a placed in a uniform electric field making an angle θ with the electric field. The Electric dipole is under the action of two equal and unlike parallel forces, which give rise to a torque on the dipole.
Can a dipole have zero electric field?
A good example is the case of a dipole, which is two charges of the same magnitude, but opposite sign, separated by some distance. At the midpoint between the charges, the electric potential due to the charges is zero, but the electric field due to the charges at that same point is non-zero.
What is the work done in rotating a dipole in electric field?
For an electric dipole p in a uniform field E we write the work done by an external agent in rotating dipole as dW=pEsinθdθ.
What is the stable state of the electric dipole in the external electric field?
The dipole is in constant equilibrium if θ = 00. A dipole in stable equilibrium, when Electric filed and dipole moment are perpendicular to each other i.e. the angle between them is zero degrees and torque will be maximum.
For which orientation of the electric dipole is in most stable position when kept in external electric field?
The dipole is in stable equilibrium when electric dipole is in the direction of electric field vector and is parallel →P∣∣→E. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
Which type of symmetry does the electric field due to a dipole obey?
spherical symmetry
What is symmetry in electric field?
For example, an electric field due to an electrically charged wire of infinite length is said to exhibit cylindrical symmetry, because the electric field strength at a given distance r from the wire will have the same magnitude at each point on the surface of a cylinder (whose axis is the wire) with radius r.