Current And Pd Characteristics

Question 1

What are the steps for the rp.

Answer 1

Voltmeter to read pd

Ammeter to read current

Record on table

Adjust variable resistor by switching direction of battery so pd is reversed

Plot in graph

Question 2

What is the independent variable

Answer 2

Direction of pd

Question 3

What is the control variable

Answer 3

Temp if resistor

Question 4

Explain the shape of iv graphs for a filament lamp.

Answer 4

Current inversely proportional to pd

Bcz resistance increases as filament gets hot

Atoms in filament vibrate more as frequent collisions through circuit

So pd increases but not current