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Explanation:

You are expected to have some understanding of how these devices work. It is helpful to actually see one or take it apart.

Magnetic force is involved where there is a magnet or material that responds to a magnet.

Of course a compass aligns itself with the magnetic field of the earth.

A magnetic door catch uses a magnet or pair of magnets to attract a metal plate, holding the door closed.

A speaker uses the reaction between the magnetic field in a coil of wire and that of a fixed magnet to move the speaker cone. (There are versions of speakers that use electrostatic force (electric field), but those are less common.)

A motor moves by creating a magnetic field in the armature that reacts with one in the stator. The latter can be created by fixed magnets, or by an electric current.

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Electric force is involved when the operation is a result of the attraction between oppositely charged particles.

An electronic air filter uses the attraction of charged particles to attract "dirt" in the air to a charged surface, so removing it from the air.

Socks from the dryer often cling to each other (static cling) because the charge they get from rubbing other dryer contents is not dissipated in the dry air. (Fabric softener can reduce this effect, presumably by making the materials more electrically conductive.)

found in the nucleus

has mass of one amu

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explanation: