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3 answers

Solenoids - for locking doors etc.

Transformers - for stepping up/down electricity voltages

Hope these help.

2007-02-07 23:07:47 · answer #1 · answered by Doctor Q 6 · 0 0

radio, television, computer,

2007-02-07 23:14:59 · answer #2 · answered by oldguy 6 · 0 0

speaker, all i can think of now.

2007-02-07 23:09:02 · answer #3 · answered by No I Dont Like You 3 · 0 0

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