# Which practical do you expect for Physics Unit 3 May 2017?

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#1
Which practical do you expect for Physics Unit 3 May 2017?
0
3 years ago
#2
I reckon the emf one
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#3
(Original post by rayyanbkc)
I reckon the emf one
The emf and internal resistance thing ryt? CAN U PLZ EXPLAIN IT BRIEFLY 😨😨
0
3 years ago
#4
(Original post by THE OBSERVER123)
The emf and internal resistance thing ryt? CAN U PLZ EXPLAIN IT BRIEFLY 😨😨
Apparatus : Voltmetre , ammeter , variable resistor , battery

set up the circuit using the apparatus above and take about 6 readings for current and terminal PD by increasing the variable resistor in regular intervals .

plot a graph of terminal PD (v) against current ( I) .

the gradient will give the eternal resistance and the y intercept is the emf .
1
#5
(Original post by rayyanbkc)
Apparatus : Voltmetre , ammeter , variable resistor , battery

set up the circuit using the apparatus above and take about 6 readings for current and terminal PD by increasing the variable resistor in regular intervals .

plot a graph of terminal PD (v) against current ( I) .

the gradient will give the eternal resistance and the y intercept is the emf .
Dont u thing something will come from waves or polarisation??
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3 years ago
#6
(Original post by THE OBSERVER123)
Dont u thing something will come from waves or polarisation??
High chance as well .

Important topics like polarisation stress concentration and melde's experiment .
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#7
(Original post by rayyanbkc)
High chance as well .

Important topics like polarisation stress concentration and melde's experiment .
WhT do u mean by stress concentration
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3 years ago
#8
(Original post by THE OBSERVER123)
WhT do u mean by stress concentration
The experiment used to measure the concentration of an unknown solution I can explain if you want .
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#9
(Original post by rayyanbkc)
The experiment used to measure the concentration of an unknown solution I can explain if you want .
Yes sure.
0
3 years ago
#10
(Original post by THE OBSERVER123)
Yes sure.

Apparatus : 2 polarising filters , a glass tube , a 360 degree protractor . Light source

take your first filter and put it in front of the glass tube and your second one behind the glass tube .Make sure they are aligned perpendicular to each other . (check by shining a source of light and see if it becomes fully polarised )

Fill the tube with a fixed concentration of sugar solutions (20-100g) and shine light through the tube . You will find that some light will pass through the end of the tube as the concentration changed the direction of the light .
Keep rotating the second filter until all the light is polarised again and nothing passes through . Use the protractor to measure the angle that you rotated your filter and finally plot a graph of angle of rotation against concentration .

Repeat for different sugar concentrations .
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#11
(Original post by THE OBSERVER123)
WhT do u mean by stress concentration
and plz this melde's experiment
0
3 years ago
#12
(Original post by THE OBSERVER123)
and plz this melde's experiment
Apparatus : String , metre stick , loads , balance

Take a long string of about 0.5 m and fix it firmly in both ends using a bench .

Connect one side of the string to a vibration generation and the other with a hook containing loads of about 10N each .
Connect a signal generator to the vibration generator and vary it to produce nodes and anti-nodes in the spring .

measure tension which is mg and the mass per unit length of the string by diving the mass of the string by it's length .

Finally square root tension/mass per unit length to get the value of wave speed .
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#13
(Original post by rayyanbkc)
Apparatus : String , metre stick , loads , balance

Take a long string of about 0.5 m and fix it firmly in both ends using a bench .

Connect one side of the string to a vibration generation and the other with a hook containing loads of about 10N each .
Connect a signal generator to the vibration generator and vary it to produce nodes and anti-nodes in the spring .

measure tension which is mg and the mass per unit length of the string by diving the mass of the string by it's length .

Finally square root tension/mass per unit length to get the value of wave speed .
Thats fine.. I sucks at phy. Are u a student ?tomorrow chem examz😇😇
0
3 years ago
#14
(Original post by THE OBSERVER123)
Thats fine.. I sucks at phy. Are u a student ?tomorrow chem examz😇😇

Yep am a student but not doing chemistry . hated it in gcses
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#15
(Original post by rayyanbkc)
Yep am a student but not doing chemistry . hated it in gcses
WhAt else you do
Only phy or...
0
3 years ago
#16
(Original post by THE OBSERVER123)
WhAt else you do
Only phy or...
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#17
(Original post by rayyanbkc)
Dont u know anyone to get some predictions on chemistry unit 3
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3 years ago
#18
(Original post by THE OBSERVER123)
Dont u know anyone to get some predictions on chemistry unit 3
Not anyone in this website
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#19
(Original post by rayyanbkc)
Not anyone in this website
Ok. Thankz man. Wts ur country
0
3 years ago
#20
What experiments should i revise?

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