What is a P-type material?

What will be an ideal response?


When pure semiconductor material is mixed with an impurity that has only three valence electrons, such as indium or gallium, the lattice structure changes, leaving a hole in the material. This hole is caused by a missing electron. Since the material now lacks an electron, it is no longer electrically neutral. Electrons are negative particles. The hole, which has taken the place of an electron, has a positive charge; therefore, the semiconductor material now has a net positive charge and is called a P-type material.

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Define runout.

What will be an ideal response?

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Dahlia produces a ________ which is an enlarged fleshy root with a section of stem tissue at the end.

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

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The oil pressure switch requires a time delay to allow the oil pressure to build up when the compressor is first turned on

Indicate whether the statement is true or false

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The human body gives off heat by which of the following?

A. convection B. radiation C. conduction D. all of the above

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