Year 13 Practicals

Question 1

For Practical 7, (SHM) what are the independent and dependent variables? (Method 1 Simple Pendulum)

Answer 1

Independent -> Length between attachment and centre of mass
Dependent -> Time period of pendulum

Question 2

For Practical 7, (SHM) what are the control variables? (Method 1 Simple Pendulum)

Answer 2

Control -> Gravitational field strength, mass of pendulum bob, angle of release

Question 3

For Practical 7, (SHM) what are the independent and dependent variables? (Method 2 Mass Spring System)

Answer 3

Independent -> Mass on end of spring
Dependent -> Time period of oscillation

Question 4

For Practical 7, (SHM) what are the control variables? (Method 2 Mass Spring System)

Answer 4

Control -> Spring constant, gravitational field strength

Question 5

For Practical 8, (Gas Laws) what are the independent and dependent variables? (Method 1 Charles’ Law)

Answer 5

Independent -> Temperature of water
Dependent -> Height of acid drop

Question 6

For Practical 8, (Gas Laws) what are the control variables? (Method 1 Charles’ Law)

Answer 6

Control -> Density of water, specific heat capacity of water, pressure of gas, mass of gas

Question 7

For Practical 8, (Gas Laws) what are the independent and dependent variables? (Method 2 Boyle’s Law)

Answer 7

Independent -> Pressure on gas (from changing weight)
Dependent -> Volume of gas in syringe

Question 8

For Practical 8, (Gas Laws) what are the control variables? (Method 2 Boyle’s Law)

Answer 8

Control -> Pressure of gas, Pressure of atmosphere, Cross sectional Area of syringe

Question 9

For Practical 9, (Capacitor Circuits) what are the dependent variables? (Method 1 Charging a Capacitor)

Answer 9

Independent -> N/A
Dependent -> Time charging, Potential difference across capacitor plates

Question 10

For Practical 9, (Capacitor Circuits) what are the control variables? (Method 1 Charging a Capacitor)

Answer 10

Control -> Emf of power source, Capacitance of capacitor, Resistance of fixed resistor

Question 11

For Practical 9, (Capacitor Circuits) what are the dependent variables? (Method 2 Discharging a Capacitor)

Answer 11

Independent -> N/A
Dependent -> Time discharging, Potential difference across capacitor plates

Question 12

For Practical 9, (Capacitor Circuits) what are the control variables? (Method 2 Discharging a Capacitor)

Answer 12

Control -> Emf of power source, Capacitance of capacitor, Resistance of fixed resistor

Question 13

For Practical 10, (Magnetic Field Between Magnets) what are the independent and dependent variables?

Answer 13

Independent -> Current through wire (between magnets)
Dependent -> Mass measurement of horseshoe clip

Question 14

For Practical 10, (Magnetic Field Between Magnets) what are the control variables?

Answer 14

Control -> Magnetic flux density, length of wire between magnets, mass of magnets

Question 15

For Practical 11, (Flux Linkage in Search Coil) what are the independent and dependent variables?

Answer 15

Independent -> Angle of secondary coil
Dependent -> Peak potential difference of secondary coil

Question 16

For Practical 11, (Flux Linkage in Search Coil) what are the control variables?

Answer 16

Control -> Number of primary coil tirns, number of secondary coil turns, PD across primary coil, Current through primary coil

Question 17

For Practical 12, (Inverse Square Law for Radioactive Source) what are the independent and dependent variables?

Answer 17

Independent -> Distance between source and detector
Dependent -> Count rate

Question 18

For Practical 12, (Inverse Square Law for Radioactive Source) what are the control variables?

Answer 18

Control -> Background count rate, time for measuring count at each distance, position of source in cup

Question 19

For Practical 7, (SHM) What is the gradient of the graph? (Method 2 Mass Spring System)

Answer 19

Solve for k

Question 20

For Practical 9, (Capacitor Circuits) How do you work out the capacitance? (Method 1 Charging a Capacitor)

Answer 20

Solve for C

Question 21

For Practical 11, (Flux Linkage in Search Coil) How do you prove proportionality?

Answer 21

Straight line best fit passing through origin

Question 22

For Practical 7, (SHM) What is the gradient of the graph? (Method 1 Simple Pendulum)

Answer 22

Solve for g

Question 23

For Practical 8, (Gas Laws) What is the x intercept? (Method 1 Charles’ Law)

Answer 23

Absolute zero

Question 24

For Practical 8, (Gas Laws) How do you prove proportionality? (Method 2 Boyle’s Law)

Answer 24

Straight line of best fit passing through origin

Question 25

For Practical 9, (Capacitor Circuits) How do you work out the capacitance? (Method 2 Discharging a Capacitor)

Answer 25

Use gradient solving for C

Question 26

For Practical 10, (Magnetic Field Between Magnets) What is the gradient of the graph?

Answer 26

Solve for B

Question 27

For Practical 12, (Inverse Square Law for Radioactive Source) How do you prove proportionality?

Answer 27

Straight line of best fit passing through origin