Module 3a Elec Fundamentals Revision

A positive ion has:

• gained an electron

• lost an electron

• has equal number of protons and electrons

A material that allows free flowing electrons to pass through it easily

• insulator

• conductor

• resistor

Which is NOT a common semi-conductor material

• silicon

• germanium

• boron

If a material is able to give up electrons more easily, it will be ________ on the triboelectric series.

• Negative

• Positive

• Neutral

Contact, friction and ________ are causes of static electricity

• Humidity

• Separation

• Rubbing

What is the distribution of static charges on an irregular shaped object?

• accumulate at points, corners, etc.

• accumulate at point of contact

• spread evenly over material

Like charges _______

• attract

• repel

• cancel out

An atom gains an electron. It is now what charge?

• positive

• negative

• neutral

The Coulomb is approx how many electrons?

• 6.28 x 10^18

• 7.25 x 10^16

• 5.87 x 10^12

Coulombs Law states that "charged bodies attract or repel each other with a force that is __________ proportional to the individual charges, and ___________ proportional to the square of the distance between them".

• inversely, directly

• directly, inversely