Resistance and I-V Characteristics

filament lamp

filament lamp

When an electrical charge flows through a(n) ________, it transfers some energy to the thermal energy store of the filament which is designed to heat up.

Ohmic conductors

________ have a constant resistance.

V Characteristics

The term I- ________ refers to a graph which shows how the current flowing through a component changes as the potential difference across it is increased.

Non linear components

________ have a curved I- V characteristic.

The calculate the resistance you can do

R=V/I

constant resistance

Ohmic conductors have a________

ohmic conductors

The resistance of________doesn't change depending on current

a graph which shows how currents changes as potential difference increases

The term I-V characteristics refers to_____________

directly proportional to potential difference

Current in ohmic conductors are______

temperature increases, so the resistance increases, which means less current flows per unit pd,

As the current in a filament lamp increases__________so graph gets shallower

will only flow in one direction, diode has a high resistance in reverse direction

In diode the current___________

Linear components

__________have an I-V characteristic thats a straight line

Non-linear components

____________have a curved I-V characteristic

alters the current flowing and potential difference

A variable resistor____________

diode

For_____, resistance depends on direction of the current, way is fine but they have a high resistance if reversed