Voltage

Question 1

Potential difference will exist between two points in a circuit that have a…?

Answer 1

Difference in charge

Question 2

What is potential difference measured in?

Answer 2

Volts

Question 3

What is the name of the force that drives the current through a circuit?

Answer 3

Electromotive force

Question 4

Name 6 methods by which voltage can be produced.

Answer 4

Chemical
Friction
Induction
Pressure
Heat
Light

Question 5

To produce a voltage chemically, the two metal plates need to be made of…?

Answer 5

Dissimilar metals

Question 6

Give an example of where voltage is produced by friction?

Answer 6

When a soft cloth is being rubbed up and down a glass rod

Question 7

Name the 3 requirements needed to produce a voltage by induction.

Answer 7

An electrical conductor
A magnetic field
Relative movement

Question 8

What determines the polarity of an induced voltage?

Answer 8

The direction of movement between the magnetic field and current.

Question 9

What determines the amount of voltage produced by a thermocouple?

Answer 9

Dependent on the 2 materials and the difference in the temperatures.

Question 10

What is the name given to the materials in a solar panel?

Answer 10

Semiconductors

Question 11

Give an example of where voltage is produced by pressure.

Answer 11

The crash sensor in an airbag system.