Discuss Faraday's experiment of bar magnet and coil for generation of electric current in coil.
(N/A) The figure shows a coil $C_{1}$ connected to a galvanometer $G$.
When the North-pole of a bar magnet is pushed towards the coil,the pointer in the galvanometer deflects,indicating the presence of electric current in the coil. The deflection lasts as long as the bar magnet is in motion. When the magnet is pulled away from the coil,the galvanometer shows deflection in the opposite direction,which indicates a reversal of the current's direction. The galvanometer does not show any deflection when the magnet is held stationary. Moreover,when the South-pole of the bar magnet is moved towards or away from the coil,the deflections in the galvanometer are opposite to those observed with the North-pole for similar movements.
Further,the deflection (and hence current) is found to be larger when the magnet is pushed towards or pulled away from the coil faster.
Instead,when the bar magnet is held fixed and the coil $C_{1}$ is moved towards or away from the magnet,the same effects are observed.
It shows that it is the relative motion between the magnet and the coil that is responsible for the generation (induction) of electric current in the coil.
When the North-pole of a bar magnet is pushed towards the coil,the pointer in the galvanometer deflects,indicating the presence of electric current in the coil. The deflection lasts as long as the bar magnet is in motion. When the magnet is pulled away from the coil,the galvanometer shows deflection in the opposite direction,which indicates a reversal of the current's direction. The galvanometer does not show any deflection when the magnet is held stationary. Moreover,when the South-pole of the bar magnet is moved towards or away from the coil,the deflections in the galvanometer are opposite to those observed with the North-pole for similar movements.
Further,the deflection (and hence current) is found to be larger when the magnet is pushed towards or pulled away from the coil faster.
Instead,when the bar magnet is held fixed and the coil $C_{1}$ is moved towards or away from the magnet,the same effects are observed.
It shows that it is the relative motion between the magnet and the coil that is responsible for the generation (induction) of electric current in the coil.
Explore More
Similar Questions
If a coil of $40$ turns and area $4.0 \, cm^2$ is suddenly removed from a magnetic field,it is observed that a charge of $2.0 \times 10^{-4} \, C$ flows through the coil. If the resistance of the coil is $80 \, \Omega$,the magnetic flux density in $Wb/m^2$ is:
Medium
View SolutionMagnetic flux linked with the coil is given by $\phi(t) = 2t^2 + 2t + 1$ and its resistance is $10 \ \Omega$. The current passing through the coil at $t = 2 \ s$ is . . . . . . $A$.
$A$ wire of irregular shape is turning into a circular shape in a magnetic field which is directed into the paper. The direction of the induced current is
Easy
View Solution$A$ coil of resistance $400 \,\Omega$ is placed in a magnetic field. If the magnetic flux $\phi \,(Wb)$ linked with the coil varies with time $t \,(s)$ as $\phi = 50t^2 + 4$,the current in the coil at $t = 2 \,s$ is.....$A$.
MediumAIPMT 2012
View Solution$A$ magnetic field of $2 \times 10^{-2} \, T$ acts at right angles to a coil of area $100 \, cm^2$ with $50$ turns. The average emf induced in the coil is $0.1 \, V$,when it is removed from the field in time $t$. The value of $t$ is $... \, sec$.
MediumAIPMT 1991
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo