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What will be the direction of drift velocity in an electric field?
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∙ 12y ago
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Wiki User
∙ 12y ago
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The direction of the electric field vector is defined as?
Direction of the electric field vector is the direction of the force experienced by a charged particle in an external electric field.
Where do electric field lines point?
The electric field lines are directed away from a positive charge and towards a negative charge so that at any point , the tangent to a field line gives the direction of electric field at that point.
Can electric field intensity be a scalar quantity?
No,because electric field (force/charge) is a vector quantity, i.e. , it has both magnitude as well as direction.
What physical quantity use both magnitude and direction?
Any vector quantity does. Examples of vector quantities include but are not limited to . . . - Displacement - Velocity - Acceleration - Torque - Force - Electric field - Momentum - Poynting vector
Why is an electric field strength a vector quantity?
for a vector quantity it must have both magnitude and direction and since it has both magnitude and direction it is therefore considered a vector
What relation between electric current and drift velocity?
The relation between electric current and drift velocity is that they both happen to involve electrons moving opposite of the electric field. The electric field must also have a conductor.
What are Drift velocity and momentum relaxation time?
Drift velocity refers to a particle's average velocity being influenced by its electric field. Momentum relaxation time is the time required for the inertial momentum of a particle to become negligible.
What is drift velocity?
In a current-carrying circuit, a charged particle is accelerated by an electric field. It also undergoes frequent collisions with the stationary ions of the wire material. These two effects result in the very slow net motion (drift) of moving charged particles in the direction of the electric force. The drift velocity describes this motion. Average drift speed for electrons is on the order of 10-4 m/s (Young and Freedman, University Physics).
Define drift velocity?
it is defined as the average velocity with which the free eloctrons get drifted towards the positive ends of the conductor under the influence of an external electric field applied
What is the relationship between the electric magnetic and wave velocity vectors?
The wave velocity vector is parallel to the cross product of the electric and magnetic vectors.If you crank a wood screw from the Electric-field direction to the Magnetic-field direction, the screw proceedsinto the wood in the direction of the wave's velocity vector.Here's another advanced and highly technical way to keep these directions straight ...Curl the fingers of your right hand in the direction FROM the electric vector TO the magnetic vector.Your right thumb (when extended) points in the direction of the waves velocity vector, and alsothe "Poynting Vector"; that's the direction in which the wave carries energy.
When there exists an electric field in a conductor why do electrons move with constant velocity but not with an acceleration?
Yes some delicate situation. Here we have to take a lot of information into consideration. Actually electrons move at random direction and in the absence of an electric field the net velocity of the electrons will be zero. Hence we can assume the initial velocity to be zero. Now as an electric field is applied then a force of eE is acting on the electron opposite to the field direction. Due to this electrons get accelerated. No doubt about it. But this acceleration is in effect only for a duartion known as relaxation time. Hence the speed picked up will be acceleration x relaxation time. So this velocity attained in that duration is called as Drift velocity. Vd = (eE / m )* t. Here m is mass of electron. Hence a constant velocity Vd
The direction of the electric field vector is defined as?
Direction of the electric field vector is the direction of the force experienced by a charged particle in an external electric field.
What is velocity modulation in klystron?
As we know in klystron tube drift space is assumed to be free of any electric field. Therefore, the high velocity electron emerging in the later period are able to overtake the low velocity electrons leaving the buncher grids. As a result of these actions, the electrons gradually bunch together as they travel down the drift space. This mechanism of variation in electron velocity in the drift space is known as velocity modulation.
What quantities is a vector in character?
Any quantity for which a direction is relevant. Examples include displacement, velocity, acceleration, force, electric field, magnetic field, and many more.
What must occur before the current flows through a circuit?
As current is the rate of flow of electric chargesAs I=Q/tso,there must be free electrons for the flow of electric current in a circuit.Then when voltage is applied at the terminals of circuit the free electrons acquire an average velocity called as drift velocity in the opposite direction to that of electric field (-E).Now the free electrons modify there random motion and a steady current begin to flow in a circuit.
What are two exambles of vector quantities?
A vector quantity is any measurement where the direction is relevant, such as position, velocity, acceleration, force, electric field, etc.
Is there velocity in field hockey?
Yes; there is movement and it has a direction.
