E103A Quiz 2

What is another term for voltage?

• electromotive force

• electrostatic force

• photoelectric force

• thermoelectric force

The characteristics of static electricity can best be summarised as:

• high voltage, low current

• low voltage, high current

• low voltage, low current

• high current, high voltage

Electrons will flow from a point of high electron potential to low electron potential

• when there is a conducting path between them

• when there is a break in the current path

• except under a short circuit condition

What is one example of an electrochemical source of electromotive force?

• solar panel

• deformed crystal

• batteries

• heating two dissimilar metals

What is one disadvantage of thermocouple as a source of electricity for homes?

• it has very low voltage

• it has a very high current

• it has a very high voltage

• it has a very low current

Why do we need transformers in our electricity distribution system?

• we don’t actually need them

• because transmission lines have resistance

• because electricity can only be sent so far

• because sub stations are located far from homes

Metals are generally good conductors. What is an example of a metal that is NOT a good conductor?

• copper

• aluminium

• stainless steel

What is a semiconductor?

• It’s a type of insulator

• it’s a material that behaves like an insulator and a conductor

• It’s a type of conductor

What happens to current during a short circuit?

• it increases a little bit

• it increases a lot

• it stays the same

• it drops

In reality, current flows from:

• positive to negative

• negative to positive

• neutral to negative

• neutral to positive