The adjoining figure shows two different arra | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) According to Lenz's Law,the induced current will flow in a direction such that it opposes the change in magnetic flux.In case $II$,the magnetic fi

Vedclass · Accepted Answer

from $b$ to $a$ and from $f$ to $e$

Vedclass · Answer

(C) According to Lenz's Law,the induced current will flow in a direction such that it opposes the change in magnetic flux.In case $II$,the magnetic field $B$ is directed into the plane (represented by $	imes$) and is decreasing.To oppose this decrease,the induced magnetic field must also be directed into the plane $(\otimes)$.By the right-hand thumb rule,for the outer loop $abgh$,the current must flow in a clockwise direction (from $a$ to $b$ and $b$ to $g$ and $g$ to $h$ and $h$ to $a$).For the inner loop $cdef$,the current must flow in a counter-clockwise direction to create an inward magnetic field (from $f$ to $e$ and $e$ to $d$ and $d$ to $c$ and $c$ to $f$).Therefore,the current flows from $b$ to $a$ in the outer loop and from $f$ to $e$ in the inner loop. Thus,option $C$ is correct.

The adjoining figure shows two different arrangements in which two square wire frames are placed in a uniform constantly decreasing magnetic field $B.$ The direction of induced current in the case $II$ is

Similar Questions

The magnetic flux through a stationary loop with resistance $R$ varies during an interval of time $T$ as $\phi = at(T - t)$. The heat generated during this time,neglecting the inductance of the loop,will be

$A$ system $S$ consists of two coils $A$ and $B$. The coil $A$ carries a steady current $I$. The coil $B$ is suspended nearby as shown in the figure. If the system is heated,so as to raise the temperature of the two coils steadily,then:

The magnetic flux linked with a coil varies with time as $\Phi = 4t^2 + 3t + 7$. The magnitude of the induced e.m.f. at $t = 2 \ s$ is: (in $V$)

$A$ 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 $t = 2 \ s$ will be: (in $A$)

$A$ rectangular coil of $20$ turns and an area of cross-section $25 \, cm^2$ has a resistance of $100 \, \Omega$. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of $1000 \, T/s$,the current in the coil is $....... \, A$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module