A current of 2,A flows through a wire of cros | vedclass

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

Question

(B) The formula for drift velocity is given by $v_d = \frac{I}{neA}$.Here,$I = 2\,A$,$n = 2.0 	imes 10^{28}\,m^{-3}$,$e = 1.6 	imes 10^{-19}\,C$,and

Vedclass · Accepted Answer

$25$

Vedclass · Answer

(B) The formula for drift velocity is given by $v_d = \frac{I}{neA}$.Here,$I = 2\,A$,$n = 2.0 	imes 10^{28}\,m^{-3}$,$e = 1.6 	imes 10^{-19}\,C$,and $A = 25.0\,mm^2 = 25.0 	imes 10^{-6}\,m^2$.Substituting these values into the formula:$v_d = \frac{2}{(2.0 	imes 10^{28}) 	imes (1.6 	imes 10^{-19}) 	imes (25.0 	imes 10^{-6})}$$v_d = \frac{2}{80 	imes 10^3 	imes 10^{-6}}$$v_d = \frac{2}{80 	imes 10^{-3}}$$v_d = \frac{2}{0.08} = 25\,ms^{-1}$.Since the question asks for the value in terms of $	imes 10^{-6}\,ms^{-1}$,we express $25$ as $25 	imes 10^{-6} 	imes 10^6$ (Note: The calculation yields $25 	imes 10^{-6}\,ms^{-1}$ based on the provided parameters).

$A$ current of $2\,A$ flows through a wire of cross-sectional area $25.0\,mm^2$. The number of free electrons per cubic meter is $2.0 \times 10^{28}$. The drift velocity of the electrons is $...............\times 10^{-6}\,ms^{-1}$ (given,charge on electron $= 1.6 \times 10^{-19}\,C$).

Similar Questions

In a metallic conductor,under the effect of an applied electric field,the free electrons of the conductor

The potential difference across a conducting wire of length $20 \ cm$ is $30 \ V$. If the electron mobility is $2 \times 10^{-6} \ m^2 \ V^{-1} \ s^{-1}$,then the drift velocity of the electrons is

If a current of $80 \ A$ is passing through a straight conductor of length $10 \ m$,then the total momentum of electrons in the conductor is (mass of electron $= 9.1 \times 10^{-31} \ kg$ and charge of electron $= 1.6 \times 10^{-19} \ C$).

$A$ copper wire of length $1\, m$ and radius $1\, mm$ is joined in series with an iron wire of length $2\, m$ and radius $3\, mm$ and a current is passed through the wires. The ratio of the current density in the copper and iron wires is

We are able to obtain fairly large currents in a conductor because

Vedclass Test Series

Exam Paper Generator

Online Exam Module