Required practicals Flashcards
P2: investigating insulators - safety
-wear eye protection
-careful with hot water
P2: investigating insulators - equipment (8)
-eye protection
-containers
-measuring cylinder
-thermometers
-insulators materials
-elastic bands
-cling film
-hot water
P2: investigating insulators - method 1 (types of materials) 6 points
-wrap 4 of 5 beakers with insulating materials = secure with rubber bands
-1 beaker with no insulation is a control beaker
-cover beakers with lid
-fill beaker with hot water
-time the temperature change every 3 mins
-record results and plot graph
P2: investigating insulators - method 2 (diff thickness)
-cover beakers with varying thickness of insulator material
-fill each beaker with warm water + cover
-record temp every 3 mins + plot graph
P2: specific heat capacity - equipment (9)
-1 kg copper, iron and aluminium metal blocks,
* thermometer
* pipette
* 30 W, 12 V heater and power supply
* insulation to wrap around the blocks
* ammeter and voltmeter
* 4mm leads
* stop watch
* balance
P2: specific heat capacity - method (9)
-check mass of aluminium block
-wrap insulation around block
-set up apparatus
-Place the immersion heater into the central hole at the top of the block.
-Place the thermometer into the smaller hole
-record starting temp of block
-switch on joulemeter + record starting reading
-turn on power supply
-After 10 minutes Record the highest temperature +calculate the temperature rise
P4: Resistance of wire - equipment (8)
-wire
-power supply
-variable resistor
-switch
-7connecting leads
-2 crocodile clips
-heat-resistant mat
-ammeter/voltmeter
P4: Resistance of wire - method (6)
-Set up the apparatus by connecting two crocodile clips to the thin resistance wire a distance of 10 cm apart
-set the power supply to 1.5 V
-Connect the wire to circuit
-Record pd from voltmeter and current from ammeter
-Move the clips in 10 cm intervals further apart
-record + repeat for each length reading
P4: Resistance of wire - safety
-don’t conect waire to main
-disconnect wire from circuit after readings are taken = prevents wire from overheating
-don’t touch wire directly
P4: Electrical components - equipment (8)
Ammeter
Voltmeter
Variable resistor
Fixed resistor
Filament lamp
Diode
Voltage Supply
Wires
P4: Electrical components - method
-Connect ammeter in series + measure resistance with resistor
-Connect a voltmeter in parallel + measure resistance with resistor
-Use a variable resistor in series with the resistor to vary pd across the resistor.
-Start with pd of 0 + increase pd by an interval of 0.2V up to 2V.
-Recording the readings on the voltmeter and ammeter.
P4: Electrical components - how to fing negative pd and current values
-Reverse the connections on the battery and repeat to find the I-V relationship
P4 - resistors in series + parallel - equipment
-power supply
-wires / croc clips
-ammeter/voltmeter
-wire
- 2 resistors
-ruler
P4 - resistors in series + parallel - method
-set up series circuit w resistor
-Record the voltmeter and ammeter readings and calculate the resistance of the resistor
-switch out r1 with r2 + calculate resistance of 2nd resistor
-Arrange the two resistors in series
-record ammeter/voltmeter reading
-Arrange the two resistors in parallel
-Record the voltmeter/ ammeter readings + calculate the total resistance of both resistors in parallel.
