The Lenz law is associated with

$A$ coil of resistance $400\,\Omega$ is placed in a magnetic field. If the magnetic flux $\phi$ (in $Wb$) linked with the coil varies with time $t$ (in $s$) as $\phi = 50t^2 + 4$,the current in the coil at $t = 2\,s$ is $..........\,A$.

$A$ circular loop of flexible conducting material is kept in a magnetic field directed perpendicularly into its plane. By holding the loop at diametrically opposite points,it is suddenly stretched outwards,then

Lenz's law applies to

The north and south poles of two identical magnets approach a coil,containing a condenser,with equal speeds from opposite sides. Then

Which discovery did Faraday make public? Discuss the importance of electromagnetic induction.