Question:
At room temperature, copper has free electron density of $8.4 \times {10}^{28}m^{-3}$.
The electron drift velocity in a copper conductor of cross-sectional area of $ {10}^{-6}m^{2}$ and carrying a current of 5.4 A, will be
At room temperature, copper has free electron density of $8.4 \times {10}^{28}m^{-3}$.
The electron drift velocity in a copper conductor of cross-sectional area of $ {10}^{-6}m^{2}$ and carrying a current of 5.4 A, will be
Updated On: Sep 3, 2024
- $4{ms}^{-1}$
- $0.4{ms}^{-1}$
- $4{cms}^{-1}$
- $0.4{mms}^{-1}$
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Drift velocity in a copper conductor
$V_d=\frac {i}{neA}$= $\frac {5.4}{8.4 \times {10}^{28}\times 1.6 \times {10}^{-19}\times {10}^{-6}}$
$=0.4 \times {10}^{-3}{ms}^{-1}$
$0.4{mms}^{-1}$
$V_d=\frac {i}{neA}$= $\frac {5.4}{8.4 \times {10}^{28}\times 1.6 \times {10}^{-19}\times {10}^{-6}}$
$=0.4 \times {10}^{-3}{ms}^{-1}$
$0.4{mms}^{-1}$
Was this answer helpful?
0
0
Top Questions on Electromagnetic induction
- In Fleming’s left hand rule, the forefinger gives:
- CBSE Class X - 2024
- Electronics and hardware
- Electromagnetic induction
- A rectangular loop of length 2.5 m and width 2 m is placed at 60° to a magnetic field of 4 T. The loop is removed from the field in 10 sec. The average emf induced in the loop during this time is:
- JEE Main - 2024
- Physics
- Electromagnetic induction
- Let us consider two solenoids A and B, made from same magnetic material of relative permeability \(µ_r\) and equal area of cross-section. Length of A is twice that of B and the number of turns per unit length in A is half that of B. The ratio of self inductances of the two solenoids, LA : LB is
- NEET (UG) - 2024
- Physics
- Electromagnetic induction
- A step up transformer is connected to an ac mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is
- NEET (UG) - 2024
- Physics
- Electromagnetic induction
- A coil of 200 turns and area $0.20 \, \text{m}^2$ is rotated at half a revolution per second and is placed in a uniform magnetic field of $0.01 \, \text{T}$ perpendicular to the axis of rotation of the coil. The maximum voltage generated in the coil is \[\frac{2\pi}{\beta} \, \text{volt}.\]The value of $\beta$ is:
- JEE Main - 2024
- Physics
- Electromagnetic induction
View More Questions
Questions Asked in JIPMER exam
- Binomial nomenclature was first introduced by
- JIPMER - 2015
- KCET - 2022
- Diversity In The Living World
- A convex lens $'A'$ of focal length $20\, cm$ and a concave lens $'B'$ of focal length $5\, cm$ are kept along the same axis with a distance $'d'$ between them. If a parallel beam of light falling on $'A'$ leaves $'B'$ as a parallel beam, then the distance $'d'$ in cm will be :
- JIPMER - 2021
- Spherical Mirrors
- A bacterial flagellum is composed of
- JIPMER - 2021
- Prokaryotic Cells
- $2,4-DNP $ test can be used to identify :
- JIPMER - 2021
- Chemical Reactions
- How many moles of acidified $K_2Cr_2O_7$ is required to liberate $6$ moles of $I_2$ from an aqueous solution of $I^-$ ?
- JIPMER - 2020
- Mole concept and Molar Masses
View More Questions
Concepts Used:
Electromagnetic Induction
Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-
- When we place the conductor in a changing magnetic field.
- When the conductor constantly moves in a stationary field.
Formula:
The electromagnetic induction is mathematically represented as:-
e=N × d∅.dt
Where
- e = induced voltage
- N = number of turns in the coil
- Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
- t = time
Applications of Electromagnetic Induction
- Electromagnetic induction in AC generator
- Electrical Transformers
- Magnetic Flow Meter