There is a current of $40$ ampere in a wire of ${10^{ - 6}}\,{m^2}$ area of cross-section. If the number of free electron per ${m^3}$ is ${10^{29}}$, then the drift velocity will be
Easy
Download our app for free and get started
(b) ${V_d} = \frac{i}{{neA}} = \frac{{40}}{{{{10}^{29}} \times {{10}^{ - 6}} \times 1.6 \times {{10}^{ - 19}}}}$
$=$ $2.5 \times {10^{ - 3}}\,m/sec$.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1The current in a conductor is expressed as $I=3 t^2+4 t^3$, where $I$ is in Ampere and $t$ is in second. The amount of electric charge that flows through a section of the conductor during $t=1$ s to $t=2 \mathrm{~s}$ is_______ C.View Solution
- 2On giving $220\,V$ to a resistor the power dissipated is $40\,W$ then value of resistance is ............... $\Omega$View Solution
- 3What is the resistance of a carbon resistance which has bands of colours brown, black and brown .............. $\Omega$View Solution
- 4In the given circuit, the voltmeter records $5\, volts$. The resistance of the voltmeter in $ohms$ isView Solution
- 5The current $I$ flowing through the given circuit will be $.....A$.View Solution
- 6Consider the circuit shown in fig. The current through the $10\,\Omega $ resistor when switch $'s'$ is $(a)$ open $(b)$ closed.View Solution
- 7In circuit shown below, the resistances are given in $ohms$ and the battery is assumed ideal with emf equal to $3\, volt$. The voltage across the resistance $R_4$ is ................. $V$View Solution
- 8The equivalent resistance across $AB$ would be ............ $\Omega$View Solution
- 9View SolutionExpress which of the following setups can be used to verify Ohm’s law
- 10Find potential of $J$ with : respect to $G -$ ............. $V$View Solution
