RPA03: Resistance

Question 1

What is the aim

Answer 1

Investigate how the resistance of a wire depends on its length and how resistance varies in a series and parallel circuit

Question 2

What is step one of measuring resistance of a wire

Answer 2

Set up a simple circuit

Question 3

Step 2 of measuring resistance of a wire 

Answer 3

Attach a length of wire a long a metre rule and attach a crocodile clip to one end

Question 4

Step three of measuring resistance of a wire of measuring resistance of a wire 

Answer 4

Attach A crocodile clip at a range of lengths on the ruler and record both the current and voltage through the wire

Question 5

Step four of measuring resistance of a wire 

Answer 5

Repeat step three for each length 

Question 6

Step five of measuring resistance of a wire 

Answer 6

Calculate resistance using: V = I x R

Question 7

Step six of measuring resistance of a wire 

Answer 7

Plot a graph of the length against the resistance of the wire

Question 8

Step one of measuring resistance within a circuit

Answer 8

Construct a circuit with resistors arranged in series

Question 9

Step two of measuring resistance within a circuit 

Answer 9

Switch on power supply and close switch

Question 10

Step three of measuring resistance within a circuit 

Answer 10

Record the voltage and current

Question 11

Step four of measuring resistance within a circuit 

Answer 11

Construct a circuit with resistors arranged in parallel and repeat step two and three

Question 12

Step five of measuring resistance within a circuit 

Answer 12

Calculate total resistance using: V=IxR