How is current formed in conductors?

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(N/A) When conductors are subjected to an electric field,the electric charges within them experience a force.If these charges are free to move,they wi

Vedclass · Accepted Answer

Vedclass · Answer

(N/A) When conductors are subjected to an electric field,the electric charges within them experience a force.
If these charges are free to move,they will constitute an electric current.
In atoms and molecules,electrons are bound to the nucleus by Coulombic forces. However,in bulk matter,molecules are packed so closely that the outer electrons are no longer strictly attached to a single nucleus.
In metals,some electrons are practically free to move randomly throughout the bulk material. When an external electric field is applied,these free electrons experience a net force and drift,resulting in an electric current.
In solid conductors,current is formed due to the motion of electrons.
In liquids (electrolytes),current is produced due to the motion of positive and negative ions in mutually opposite directions.
In gases,current is produced due to the motion of ions formed by ionization.

Similar Questions

The charge flowing in a conductor changes with time as $Q(t) = \alpha t - \beta t^2 + \gamma t^3$. Where $\alpha, \beta$,and $\gamma$ are constants. The minimum value of current is:

The charge flowing in a conductor varies with time as $Q = at - bt^2$. Then for current,which statement is incorrect?
$(A)$ decreases linearly with time
$(B)$ reaches a maximum and then decreases
$(C)$ falls to zero after time $t = a/2b$
$(D)$ changes at a rate $-2b$

The current flowing through a wire depends on time as $I = 3t^2 + 2t + 5$. The charge flowing through the cross-section of the wire in the time interval from $t = 0$ to $t = 2 \ s$ is: (in $C$)

$A$ steady current flows in a metallic conductor of non-uniform cross-section. The quantity/quantities constant along the length of the conductor is/are:

In an electrolyte,$3.2 \times 10^{18}$ bivalent positive ions drift to the right per second,while $3.6 \times 10^{18}$ monovalent negative ions drift to the left per second. Then the current is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module