but if a negative is taken in the electric field, the electric force acts just opposite in the direction of electric field. hence, when electric field is applied to the ends of a conductor, the free electron starts moving in the direction
opposite to E
. therefore the correct option is (b) opposite to E.
When electric field is applied on the ends of a conductor the free electrons acquire a small velocity in a direction?
In absence of any electric field the electrons are moving randomly , colliding with each other and again attaining a random velocity , but when we apply an external electric field the
randomness
is little controlled and electrons tend to attain velocity in the direction opposite to the applied electric field although …
When an electric field is applied to a conductor the free electrons?
If an electric field is applied to a metallic conductor, the free electrons
experience a force but do not accelerate
; they only drift at a constant speed.
How do free electrons in a conductor move in the presence of an electric field?
electrical conduction
The electrons that are free to move will gain some speed. Since they have a negative charge, they move in
the direction opposite that of the electric field
. The current i is defined to have a positive value in the direction of flow of positive charges.
When conductors are placed in an electric field their electrons are moved?
When conductors are placed in an electric field, their electrons are moved. Electrons in a conductor move
in the opposite direction
when placed in an electric field. Inside the conductor, now there are actually 2 equally balanced opposite Electric Fields. So, the net field inside the conductor is zero.
What is the relation between electric field and current density?
For an amazingly wide range of materials, an empirical rule called Ohm’s law gives the following relation between current density and applied electric field:
J = σ E
. In other words, the current density is directly proportional to the electric field.
What does electric field depend on?
The magnitude of the electric field around an electric charge, considered as source of the electric field, depends on
how the charge is distributed in space
. … The value of the electric field has dimensions of force per unit charge.
When electric field E is applied on the ends?
When electric field (→E) is applied on the ends of a conductor,
the free electrons starts moving in direction
.
What is the velocity when the electric field is 5V m and the magnetic field is 5A M?
What is the velocity when the electric field is 5V/m and the magnetic field is 5A/m? =
1m/s
.
What is the average net velocity in the direction of the electric field?
This average net velocity in the direction of electric field is
Drift velocity
.
Do conductors have free electrons?
Conductors conduct electrical current very easily because of their free electrons
. Insulators oppose electrical current and make poor conductors. Some common conductors are copper, aluminum, gold, and silver.
What is the path taken by an electron inside a conductor in presence of field?
(a) (i) In the presence of electric field, the paths of free electrons in a metal conductor
are curved
. … The different free electrons in a metal conductor move with differennt velocity in the presence of electric field.
Do electrons move freely?
These loose electrons are called free electrons. They
can move freely throughout the metallic structure
. An electric current is the flow of these free electrons in one direction. Energy is required to make the free electrons travel in one direction.
Can electric field inside a conductor be non zero?
Can the electric field inside a conductor be non zero? The answer is NO.
Electric field inside a conductor is always zero
. Reason: The electricity conducting free electrons are only present on the external surface of the conductor.
Why is electric field in a conductor zero?
Electric field is zero inside a charged conductor. For a charged conductor, the charges will lie on the surface of the conductor.So,
there will not be any charges inside the conductor
. When there is no charge there will not be electric field.
Is the electric potential inside a conductor zero?
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.
