Morse failed to properly credit Vail for the powerful electromagnets used in his telegraph.

The rare earth monazite is collected by powerful electromagnets.

The wall of living flame had acted as a gigantic, tremendously powerful, electromagnet.

Superconducting magnets are some of the most powerful electromagnets known.

It may be performed with a powerful, adjustable-strength electromagnet.

The powerful electromagnets generate an attractive force of 3,200 pounds, and will be tried in several test situations.

He found Tom setting up an experiment with a glass sphere to which were affixed six powerful electromagnets.

You can make a super powerful electromagnet in less than half of an hour.

In this case a series of powerful electromagnets on the ends of cables.

The powerful electromagnets used in door locks can also be adapted for use directly as restraints.