Required Practicals

Question 1

What is the aim of the specific heat capacity praq?

Answer 1

Specific heat capacity correlation with decreasing energy store

Question 2

What equipment is used in the practical?

Answer 2

1 kg copper
Pipette
Thermometer
Heater
Power supply
Insulation

Question 3

What is the method for the practical?

Answer 3

Set up and wrap insulation round block.
Put thermometer in second hole and add water to increase thermal contact.
If power unknown check power supply and do P=Iv
Measure temp every 10 mins and plot graph of temp to work done and fine gradient of line.
Specific heat cap is gradient of line/mass.

Question 4

What are safety precautions?

Answer 4

Don’t handle block or heater whilst heating.
Keep on heatproof mat.
Don’t spill water near power supply

Question 5

What equipment is used in resistance practical?

Answer 5

Power supply
Ammeter
Voltmeter
Wire
Ruler

Question 6

What is method to find resistance?

Answer 6

Set up circuit attach a length of wire along ruler and crocodile clips.
Attach second clip and record the current and voltage through wire.
Move croc clip 10cm back along wire and measure current and voltage.
Calculate resistance at each point using V=Ir
Plot length of wire on x axis and resistance on y axis.

Question 7

What are safety precautions?
For Resistance

Answer 7

Uninsulated wire may become hot as current passes through it so avoid handling.

Question 8

What is the method for IV characteristics practical?

Answer 8

Construct circuit in diagram.
Set up power supply at lowest setting for potential difference.
Record current and voltage over resistor.
Increase current by power supply by 2V.
Change resistor to filament lamp.
Change from lamp to diode and repeat.
Plot current against voltage for each comp on a graph.