Key Practical's

Question 1

Determining the density of solids

Answer 1

find mass / volume
use calibrated scales, callipers and a ruler

Question 2

Finding unknown masses with moments

Answer 2

Use masses and a clamp stand, moving the masses along and reading lengths then calculate

Question 3

Measurement of g by free fall

Answer 3

The electromagnet holds a metal ball then it is turned off and timed till it hit the bottom plate
Take from a range of heights
Plot a graph of t squared against h then gradient x2 = g

Question 4

Newtons 2nd law

Answer 4

Use a string with masses attached over a pulley with light gates on the table
let the masses go one at a time then take them off one at a time attaching to the anchor on the table
repeat and find a graph of a against f to find m

Question 5

Youngs Modulus from a wire

Answer 5

Attach a wire to an anchor point with masses off the table at one end , measure initial length
each time mass is added them the wire will extend use markers to show this
measure this extension and find strain
use a calliper to find diameter then calculate stress
stress / strain = YM

Question 6

Finding g with a pendulum

Answer 6

Set up a string with a bob on the end from a clamp stand
hold the bob so it is horizontal and release
count and time 10 oscillations then find average length of one
each time shorten the pendulum
then plot period squared against L
inverse gradient x 4pi2 = g

Question 7

Damping of a spring

Answer 7

Attach a string with masses hanging and stretch and release to see how the amplitude varies with each bounce
Add cardboard inbetween each mass and repeat experiment to see the change in amplitude
plot a graph of amplitude against number of bounces to see correlation

Question 8

Specific Heat Capacity

Question 9

Characteristics of a filament lamp and wire at a constant temp

Question 10

Resistivity of a metal

Question 11

Variation of resistance with temp

Question 12

Internal resistance of a cell

Question 13

Charging and discharging capacitors

Question 14

Energy stored in a capacitor

Question 15

Variation of intensity for polarisation

Question 16

Wavelength with Youngs double split

Question 17

Wavelength with diffraction grating

Question 18

Refractive index of a material

Question 19

Finding h with LEDs

Question 20

Force on a current in a magnetic field

Question 21

Magnetic flux density with a hall probe

Question 22

Variation of gamma radiation with varying distance