Question

The power liens that run through your neighborhood carry alternating currents that reverse direction 120 times per second. As current changes so does magnetic field. If you put a loop of wire up near the power line to extract power by tapping the magnetic field, sketch how you would orient the coil of wire next to a power line to develop the max emf in the coilo If magnetic flux through a loop changes, induced emf is produced

o If the area of the loop is parallel to the field, the flux through the loop is minimum
• So no emf is produced
o To get the most of the flux through the loop you place it closer to the power lines and in orientations so the plane of the loop also contains power lines
• Flux would be max and result in greater induced emf as field goes from max to zero to max and then in other direction

Answer 1

the normal to the area of ​​the loop parallel to the wire to induce the maximum electromotive force

Step-by-step explanation:

Faraday's law is

ε = - dΦ / dt

where Ф magnetic flow

the flow is

Ф = B. dA = B dA cos θ

therefore, to obtain the maximum energy, the cosine function must be maximum, for this the direction of the fluctuating magnetic field and the normal direction to the area must be parallel.

The magnetic field in a cable through which current flows is circular, so the loop must be perpendicular to the wire, this is the normal to the area of ​​the loop parallel to the wire to induce the maximum electromotive force

an outline is shown in the attachment

the correct answer is b