Paper 1-Set practicals

Question 1

Practical for specific heat capacity

Answer 1

1. Set up apparatus as shown in the diagram (the one with the aluminium block and heater)
2. Measure mass of aluminium block using mass balance
3. Measure initial temp of aluminium blcok using the thermometer
4. Start power supply and stop watch
5. Record current shown on ammeter and pd on voltmeter
6. Take several periodic measurements (e.g. every minute)
7. Calculate the energy supplied using E= IVt
8. Plot a graph of temperature against energy supplied

Question 2

Practical about thermal insulation

Answer 2

1. Set up apparatus as shown (small beaker in big beaker with insulator between beakers, card on top and thermometer in the water + good old stopwatch)
2. Fill the beaker with 80cm³ hot water
3. Record temp of water and then start stopwatch
4. Record temp every 3 mins for 15 mins
5. Repeat steps 1-4 using different materials

Question 3

Resistors in series vs in parallel
(the match of a lifetime- clearly.)

Answer 3

1. Use the circuit diagram to set up and connect the circuit in series
2. Switch on and record the readings on the ammeter and the voltmeter
3. calculate total resistance in series using the equation: R = V / I
4. use the circuit diagram to set up and connect the circuit in parallel
5. Switch on and record the readings on the ammeter and the voltmeter
6. calculate total resistance in series using the equation: R = V / I

Question 4

Investigating components in a circuit

Answer 4

1. Set up circuit as shown in the diagram (circuit with ammeter, bulb, voltmeter and variable resistor)
2. Record readings on ammeter and voltmeter on a suitable table
3. Adjust the variable resistor and record the new readings on the ammeter and voltmeter
4. repeat this to obtain several pairs of readings
5. swap the connections on the battery in order to get negative readings
6. continue to record pairs of readings of current and potential difference with the battery reversed
7. plot a graph with current against potential difference

Question 5

calculating density of an object (solid)

Answer 5

1. weigh the mass of the object using a mass balance
2. fill the eureka can with water just to below the spout
3. place an empty measuring cylinder just below its spout
4. carefully lower object into eureka can
5. measure volume of water displaced
6. repeat and take an average before calculating density

Question 6

calculating the density of an object (liquid)

Answer 6

1. put measuring cylinder on mass balance and measure (empty)
2. fill the cylinder with the liquid and note down the volume
3. subtract the original mass of the empty measuring cylinder
4. repeat to take an average before calculating the density