Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper having 1, mm diameter, then the

Q: Every atom makes one free electron in copper. If $1.1$ $ampere$ current is flowing in the wire of copper having $1\, mm$ diameter, then the drift velocity (approx.) will be (Density of copper $ = 9 \times {10^3}\,kg\,{m^{ - 3}}$ and atomic weight = $63$)

b (b) Density of $Cu = 9 \times {10^3}\,kg/{m^3}$ (mass of $1$ $m^3$ of $Cu$) ( $6.0 \times 10^{23}$ atoms has a mass = $63 \times 10^{-3}\, kg$ Number of electrons per $m^3$ are $ = \frac{{6.0 \times {{10}^{23}}}}{{63 \times {{10}^{ - 3}}}} \times 9 \times {10^3} = 8.5 \times {10^{28}}$ Now drift velocity $ = {v_d} = \frac{i}{{neA}}$ $ = \frac{{1.1}}{{8.5 \times {{10}^{28}} \times 1.6 \times {{10}^{ - 19}} \times \pi \times {{(0.5 \times {{10}^{ - 3}})}^2}}}$ $ = 0.1 \times {10^{ - 3}}\,m\,/sec$

SECTION - A [PHYSICS - MCQ]

GSEB - English Medium

Every atom makes one free electron in copper. If $1.1$ $ampere$ current is flowing in the wire of copper having $1\, mm$ diameter, then the drift velocity (approx.) will be (Density of copper $ = 9 \times {10^3}\,kg\,{m^{ - 3}}$ and atomic weight = $63$)

A$0.3\,mm/\sec $
B$0.1\,mm/\sec $
C$0.2\,mm/\sec $
D$0.2\,cm/\sec $

Diffcult

STD 11 Science
NEET
STD 12 - 3. current electricity
Physics

Download our app
and 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.*

Download App

Similar Questions

1
The reading of an ideal voltmer in the circuit shown is.....$V$
View Solution
2
A cell of negligible resistance and $e.m.f.$ $2$ $volts$ is connected to series combination of $2$, $3$ and $5\, ohm$. The potential difference in volts between the terminals of $3\, ohm$ resistance will be
View Solution
3
Two electric bulbs whose resistances are in the ratio of $1 : 2$ are connected in series. The powers dissipated in them have the ratio
View Solution
4
Two wires $A$ and $B$ of the same material, having radii in the ratio $1: 2$ carry currents in the ratio $4: 1$. The ratio of drift speed of electrons in $A$ and $B$ is .......
View Solution
5
Two batteries with e.m.f $12\ V$ and $13\ V$ are connected in parallel across a load resistor of $10\,\Omega$ . The internal resistances of the two batteries are $1\,\Omega$ and $2\,\Omega$ respectively. The voltage across the load lies between
View Solution
6
Twelve wires of equal length and same cross-section are connected in the form of a cube. If the resistance of each of the wires is $R$, then the effective resistance between the two diagonal ends would be
View Solution
7
The equivalent resistance between points $A$ and $B$ of an infinite network of resistances each of $1\,\Omega $ connected as shown, is
View Solution
8
A $4\,\mu F$ conductor is charged to $400\, volts$ and then its plates are joined through a resistance of $1\,k\Omega $. The heat produced in the resistance is ............... $J$
View Solution
9
A potentiometer is used for the comparison of $e.m.f.$ of two cells ${E_1}$ and ${E_2}$. For cell ${E_1}$ the no deflection point is obtained at $20\,cm$ and for ${E_2}$ the no deflection point is obtained at $30\,cm$. The ratio of their $e.m.f.$'s will be
View Solution
10
Two batteries one of the $\mathrm{emf}$ $3\,V$, internal resistance $1$ ohm and the other of $\mathrm{emf}$ $15\, V$, internal resistance $2$ $\mathrm{ohm}$ are connected in series with a resistance $R$ as shown. If the potential difference between $a$ and $b$ is zero the resistance of $R$ in $\mathrm{ohm}$ is
View Solution

Download our appand get started for free

Similar Questions

Download our app
and get started for free