What are the three categories of materials used in electricity?

What will be an ideal response?


The three categories are conductors, insulators, and semiconductors.

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The term spirit level indicates that one of the substances being used inside the vial of a level is not _____ .

A. alcohol B. light oil C. acidic D. water

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?Which of the following is/are true about titanium valves?

A. ?They are stronger. B. ?They are often replaced after a race. C. ?They require less valve closed seat pressure. D. All of the above E. A and B only

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With experience, you can learn to draw the ____________________ view and the

____________________ view at the same time the ____________________ view is being drawn.

Fill in the blank(s) with the appropriate word(s).

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How many degrees of CRANKSHAFT rotation are required for a piston to travel from TDC to BDC and return to TDC?

A) 180 B) 360 C) 90 D) 720

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