13/04/2023Investigating Resistance

Starter:• Copy the following circuit and

add a voltmeter and an ammeter to measure the potential difference across the resistor and the current through it.

• What does a variable resistor do?

We are learning to:• Correctly set up a circuit to measure the resistance of

a component using a voltmeter, ammeter and variable resistor.

Keywords: variable resistor potential difference

Investigating Resistance

Practical:• Draw and build the circuit below.• Copy the table and record the

voltage and current several times by moving the variable resistor.

• Repeat for a bulb and a Diode

13/04/2023

Resistor EPotential difference (V)

Current (A)

+ +

+ +

+ +

+ +

+ +

- -

- -

- -

- -

- -V

E

A6V Hint:

To get negative or

positive values

swap the leads on

the powerpack

terminal

Investigating Resistance

You should have 3 tables. You must complete 3 graphs

13/04/2023

Resistor EPotential difference (V)

Current (A)

+ -

+ -

+ -

+ -

+ -

- -

- -

- -

- -

bulbPotential difference (V)

Current (A)

+ -

+ -

+ -

+ -

+ -

- -

- -

- -

- -

diodePotential difference (V)

Current (A)

+ -

+ -

+ -

+ -

+ -

- -

- -

- -

- -