A circular coil is placed near a current-carr | vedclass

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

Question

(D) According to the right-hand thumb rule, if the current in the wire flows upward, the magnetic field lines in the region of the coil are directed i

Vedclass · Accepted Answer

None of these

Vedclass · Answer

(D) According to the right-hand thumb rule, if the current in the wire flows upward, the magnetic field lines in the region of the coil are directed into the plane of the paper.If the current in the wire flows downward, the magnetic field lines in the region of the coil are directed out of the plane of the paper.For a clockwise induced current in the loop, the induced magnetic field must be directed into the plane of the paper (by the right-hand grip rule).According to Lenz's law, the induced current opposes the change in magnetic flux.Case $1$: If the current is flowing upward and increasing, the magnetic field into the plane increases, so the induced current will be counter-clockwise to oppose it. This does not match.Case $2$: If the current is flowing upward and decreasing, the magnetic field into the plane decreases, so the induced current will be clockwise to support it.Case $3$: If the current is flowing downward and increasing, the magnetic field out of the plane increases, so the induced current will be counter-clockwise to oppose it.Case $4$: If the current is flowing downward and decreasing, the magnetic field out of the plane decreases, so the induced current will be clockwise to support it.Since the current must be time-dependent to induce a current, and both decreasing upward current and decreasing downward current can produce a clockwise induced current, the most appropriate general description is that the current is time-dependent.

$A$ circular coil is placed near a current-carrying conductor, both lying on the plane of the paper. The current is flowing through the conductor in such a way that the induced current in the loop is clockwise, as shown in the figure. The current in the wire is,

Similar Questions

$A$ rectangular loop of wire is coplanar with a long wire carrying current $I$. The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop?

The magnetic flux through a loop of resistance $10 \Omega$ is given by $\phi = 5t^2 - 4t + 1 \text{ Wb}$. How much current is induced in the loop after $0.2 \text{ s}$ (in $\text{ A}$)?

To induce an $e.m.f.$ in a coil, the linking magnetic flux

The coil of area $0.1 \ m^2$ has $500$ turns. After placing the coil in a magnetic field of strength $4 \times 10^{-4} \ Wb/m^2$,if it is rotated through $90^o$ in $0.1 \ s$,the average emf induced in the coil is......$V$

Vedclass Test Series

Exam Paper Generator

Online Exam Module