Do electric field lines exist? The electric field lines can never form closed loops, as line can never start and end on the same charge. These field lines always flow from higher potential to lower potential. If the electric field in a given region of space is zero, electric field lines do not exist .
Why is there no electric field lines?
The field lines starts (or diverges) from the positive charge and terminate (or converges) on negative charge. If the electric field lines form closed loop , these line must originate and terminate on the same charge which is not possible because electric field lines always moves from positive to negative .
Can electric field lines exist without charges?
Q1, Yes, there can be an electric field at a point with no charge . But there will be no force from it untill a point with a charge is there. No, there will always be a field with a charge.
Why are electric field lines not discontinuous?
Why electric field lines do not pass through a conductor?
Solution : As the interior of the conductor is free from the influence of the electric field because the total charge of a charged conductor lies at the outer surface of the conductor , hence electric field lines cannot pass through a conductor.
Why does an electric field exist?
An electric field is said to exist in the region of space around a charged object. This charged object is the source charge. When another charged object, the test charge, enters this electric field, an electric force acts on it . The electric field is defined as the electric force on the test charge per unit charge.
Can electric field exist without a magnetic field?
No, it is not possible for a magnetic field to exist without an electric field .
Can electricity exist without magnetism but magnetism Cannot exist without electricity?
Electric and magnetic fields are two aspects of that same basic force, and it is impossible to have “electricity” without encountering these fields. So if that’s what the question was intended to mean, no, you cannot have electricity without both magnetic and electric fields .
Is electric field always continuous?
The electric field in a region is always continuous provided that there is no charge at the point of consideration .
Why electric field lines are always perpendicular to the surface of conductor?
If electric field was not perpendicular to the surface, that means it has a component along the surface . Since electric field exerts a force on the charges, now we have a force on the charges along the surface. This force isn’t balanced, so it will then move charges around i.e, there would be surface currents.
Why do two electric field lines never intersect?
Electric lines of force never intersect each other because at the point of intersection, two tangents can be drawn to the two lines of force . This means two direction of electric field at the point of intersection, which is not possible.
Can an electric field line begin and end on the same conductor?
But the external surface of a charged conductor is always on equipotential surface. So it is not possible for a conductor being charged positively in on part and negetively in another part. Thus a field line cannot start from a conductor and end on the same .
Do insulators block electric fields?
In electrodynamics, the electric field and magnetic field are linked, so if you block the electric field, you also block the magnetic field that is linked to it. In this case, an insulator can block the magnetic field indirectly . In detail, an electric field that is changing in time induces a magnetic field.
Can electric field lines enter inside the conductor?
The net electric field inside a conductor is zero. Therefore, the electric field lines do not pass through a conductor .
Does an electric field exist in empty space?
Yes, according to Maxwell’s equations an electric field exists in empty space .
Is electric field real or imaginary?
Actually, electric fields are real . Using complex exponentials bears no advantage other than convenient calculation. The interpretation usually is that the imaginary part is discarded and only the real part is taken to be, well, real.
Are fields real?
A field is a mathematical abstraction. There are scalar fields, vector fields, etc. Still, they are there, they are real : we use this abstraction to predict the behaviour of an object that really is there.
In which field electric field can exist in the absence of?
Without the electric field, the magnetic field exists in permanent magnets and electric fields exist in the form of static electricity, in absence of the magnetic field .
How an electromagnetic field exists only when there is?
What is the difference between electric field lines and magnetic field lines?
Difference Between Electric Field And Magnetic Field
The magnetic field is an exerted area around the magnetic force . It is obtained by moving electric charges. The direction of the magnetic field is indicated by lines. While the electric fields are generated around the particles which obtain electric charge.
Which is stronger electric field or magnetic field?
The way in which charges and currents interact with the electromagnetic field is described by Maxwell’s equations and the Lorentz force law. The force created by the electric field is much stronger than the force created by the magnetic field .
Is magnetic field same as electric field?
A magnetic field is a field explaining the magnetic influence on an object in space. A electric field is a field defined by the magnitude of the electric force at any given point in space .
Do magnets run out of energy?
At a temperature called the Curie point – this varies in different metals, but it is around 770° in iron – permanent magnetism is lost altogether . Over a longer period of time, random temperature fluctuations, stray magnetic fields and mechanical movement will cause magnetic properties to decay.
Which of the following statements is not true about electric field lines?
Electric field lines cannot be taken as continuous curve .
Are electric lines discontinuous?
Electric field lines are continuos curves . They start from a positively charged body and ends at a negatively charged body. No electric lines of force exist inside the charged body. Thus electrostatic field lines are continuous but do not form closed loops.
Where are electric field lines discontinuous?
The electric field for a single point charge is discontinuous — in fact singular — at the point charge. Electric field lines are discontinuous at the location of electric charges , but continuous otherwise.
Where do electric field lines originate?
Electric field lines either originate on positive charges or come in from infinity , and either terminate on negative charges or extend out to infinity. At every point in space, the field vector at that point is tangent to the field line at that same point.
Why electric field lines must be at right angles to equipotential lines?
this is because there is no potential gradient along any direction parallel to the surface , and so no electric field parallel to the surface . This means that the electric lines of force are always at right angle to the equipotential surface.
Where is the electric field largest?
Can electric field cross each other?
What does Gauss theorem state?
Gauss’s law for electricity states that the electric flux Φ across any closed surface is proportional to the net electric charge q enclosed by the surface ; that is, Φ = q/ε 0 , where ε 0 is the electric permittivity of free space and has a value of 8.854 × 10 – 12 square coulombs per newton per square metre.
What happens if two electric field lines intersect each other?
Is there an electric field outside a conductor?
The electric field is zero inside a conductor . Just outside a conductor, the electric field lines are perpendicular to its surface, ending or beginning on charges on the surface. Any excess charge resides entirely on the surface or surfaces of a conductor.
Can electric field pass through metal?
Conducting metals has many free electrons which move freely inside the conductor. When these conductors are kept in the electric field, the free electrons arrange in such a way that the electric field inside the conductor will be zero . Was this answer helpful?
Why does current make things hot?
Due to the wires having electrical resistance, which means that they resist the motion of electrons, the electrons bump into atoms on the outside of the wire, and some of their kinetic energy is given to the atoms as thermal energy. This thermal energy causes the wire to heat up.
Can electric field pass through dielectric?
Insulators are materials that hinder the free flow of electrons from one particle of the element to another. Whereas dielectric or insulators can be polarised by the electric field. Rather electric field passes ONLY through the insulator . Conductors are rather perfect obstruction of electric field.
