Drift speed of electrons, when 1.5A of current flows in a copper wire of cross section 5mm2, is v. If the electron density in copper is 9×1028/m3 the value of v in mm/s is close to (Take charge of electron to be =1.6×10−19C)
0.2
3
2
0.02
A
2
B
0.02
C
0.2
D
3
Open in App
Solution
Verified by Toppr
The correct option is D0.02 I=neAvd ⇒vd=IneA=1.59×1028×1.6×10−19×5×10−6 =0.02mm/s
Was this answer helpful?
34
Similar Questions
Q1
Drift speed of electrons, when 1.5A of current flows in a copper wire of cross section 5mm2, is v. If the electron density in copper is 9×1028/m3 the value of v in mm/s is close to (Take charge of electron to be =1.6×10−19C)
View Solution
Q2
Drift speed of electrons, when 1.5A of current flows in a copper wire of cross-section 5mm2, is v. If the electron density in copper is 9×1028m−3 the value of v in mm s−1 close to (Take charge of electron to be=1.6×10−19C)
View Solution
Q3
Find the current flows through a copper wire of length 0.2 m, area of cross-section 1mm2 , when connected to a battery of 4V. Given that electron mobility is 4.5×10−6m2s−1 and charge on an electron is 1.6×10−19C The number density of electron in copper wire is 8.5×1028m3
View Solution
Q4
Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 1.0×10−7m2 carrying a current of 1.5A. Assume the density of conduction electrons to be 9×1028m−3.
View Solution
Q5
A copper wire has a cross sectional area of 1mm2. The electron density of copper is 8.5×1028m3. Calculate the mean drift velocity of the electrons through the wire when the current is 3 A.