Question

nolan set up the equipment shown in order to induce a current in a wire. which best explains why no current is induced? the wire needs to be coiled less tightly. the wire needs to be straight, not coiled. the magnet needs to be moved through the coils of wire. the magnet needs to be held above the coils of wire.

Explanation:

To induce a current in a coil (electromagnetic induction), there must be a change in magnetic flux. This occurs when the magnet moves relative to the coil (or vice versa) to change the magnetic field through the coil. If the magnet is stationary (as it appears in the setup, just held near), no change in flux happens. Moving the magnet through the coils would create a changing magnetic field, inducing current. Other options: Coiling tightness/shape (straight vs coiled) isn’t the issue—coils help, and holding the magnet above doesn’t create the necessary flux change as moving it through does.

Answer:

The magnet needs to be moved through the coils of wire.