A simple electric doorbell probably uses ________ to ring the bell

A) transistor B) a permanent magnet
C) a DPDT switch D) an electromagnet


D

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These notes relate to the entire print.

a. related notes b. general notes c. specific notes d. common notes

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What is the largest environmental problem stemming from agriculture?

A) air pollution B) soil erosion C) insect control D) sunlight

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The figure of merit is a number that provides an objective method of determining the relative ability of a permanent magnetic motor

Indicate whether the statement is true or false

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In a parallel circuit, the total line current must equal _____

a. the branch current divided by the number of resistors b. the branch current divided by the total resistance c. the sum of the branch currents d. zero

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