Required Practicals

Question 1

What are the 6 steps to find specific heat capacity of a material?

Answer 1

1) Turn on power supply
2) Measure temperature every minute for 10 minutes
3) Calculate power with P = VI
4) For each minute over the 10 minutes, calculate energy transferred with E = Pt
5) Plot Graph (see diagram in book)
6) Specific heat capacity formula

Question 2

What is the specific heat capacity formula?

Answer 2

Specific heat capacity

=

                1 ——————————— gradient x mass of block

Question 3

How is the practical for specific heat capacity set up?

Answer 3

Power supply - set Potential Dif. (V)

2 wires, one plugs directly to the ammeter, the other plugs into the heater.

The heater plugs into the ammeter as well.

Question 4

How is the heater set up for specific heat capacity practical?

Answer 4

Heater goes into small hole in a block of the material wish to be used, and so does the thermometer and insert a couple drops of oil.

Then fully insulate the material by wrapping it in cotton wool

Question 5

What is specific heat capacity?

Answer 5

The energy required to raise 1 kilogram by 1 degree C

Question 6

What are the 3 steps to find a components I-V characteristics?

Answer 6

1) Very variable resistor to change current through circuit, then take a reading of I and V, repeat until ammeter is maxed out.
2) Swap over wires connected to the battery to reverse current and repeat step 1
3) Plot values on I-V graph

Current - y axis
Potential difference - x axis

Question 7

What is needed for an I-V practical?

Answer 7

A circuit containing the following.

• Battery
• Variable Resistor
• Ammeter
• Voltmeter - attached to component
• Component:
  Resistor
  Filament Lamp
  Diode

Question 8

For what graphs on an I-V practical look like, check page 116.

Answer 8

For what graphs on an I-V practical look like, check page 116.