In a hydrogen discharge tube,it is observed t | vedclass

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

Question

(A) The electric current $I$ is defined as the rate of flow of net charge through a cross-section.Electrons moving from right to left constitute a cur

Vedclass · Accepted Answer

$1\,mA$ towards right

Vedclass · Answer

(A) The electric current $I$ is defined as the rate of flow of net charge through a cross-section.Electrons moving from right to left constitute a current from left to right.Protons moving from left to right constitute a current from left to right.Since both currents are in the same direction,they add up.$I = I_e + I_p = (n_e e) + (n_p e) = (n_e + n_p)e$Given $n_e = 3.13 	imes 10^{15}$ and $n_p = 3.12 	imes 10^{15}$,and $e = 1.6 	imes 10^{-19}\,C$.$I = (3.13 	imes 10^{15} + 3.12 	imes 10^{15}) 	imes 1.6 	imes 10^{-19}\,A$$I = (6.25 	imes 10^{15}) 	imes 1.6 	imes 10^{-19}\,A$$I = 10 	imes 10^{-4}\,A = 10^{-3}\,A = 1\,mA$.Since both components of the current are directed from left to right,the total current is $1\,mA$ towards the right.

In a hydrogen discharge tube,it is observed that through a given cross-section,$3.13 \times 10^{15}$ electrons are moving from right to left and $3.12 \times 10^{15}$ protons are moving from left to right per second. What is the electric current in the discharge tube and what is its direction?

Similar Questions

$A$ flow of $10^{7}$ electrons per second in a conducting wire constitutes a current of

In a closed circuit,the current at time $t$ is given by $I = 4 - 0.08t$. The number of electrons passing through the cross-section of the conductor in $50 \ s$ will be:

The current flowing through a wire varies with time according to the formula $I = 3t^2 + 2t + 5$. The total charge passing through a cross-section of the wire in the interval from $t = 0$ to $t = 2$ seconds is ........... $C$.

Identify the set in which all the three materials are good conductors of electricity.

The current in a wire varies with time according to the relation $I = 4 + 2t$. The quantity of charge which has passed through a cross-section of the wire during the time $t = 2 \, s$ to $t = 6 \, s$ will be .............. $C$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module