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A level cie physics p1 9702/12/o/n/16

Hi does anyone have the solutions for this paper ? I m desprate!!

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Do you have a copy of it? if yes send it.
im busy right now
but i do it late
like next 5 houres
(edited 5 years ago)
Original post by rosemariechua
Hi does anyone have the solutions for this paper ? I m desprate!!




If you can find the question paper, I believe you can find the mark scheme on the same website You should at least attempt the questions and ask on the questions that you do not know how to do.
Original post by Arvin Zaker 2001
im busy right now
but i do it late
like next 5 houres

sorry
i had an urgent job
Ill surely text you tommorow+
Original post by Eimmanuel
If you can find the question paper, I believe you can find the mark scheme on the same website You should at least attempt the questions and ask on the questions that you do not know how to do.


Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee
Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


I am assuming that these are questions that you have problems. I would give you hints rather than working out the answers for you.

Q4.

You are given the time interval between the two peaks of the waveforms.
Time base setting is found by the formula
Δtnumber of divisions between the time interval \dfrac{ \Delta t }{ \text{number of divisions between the time interval}}

This question is the backward way of solving the problem in the youtube.
https://www.youtube.com/watch?v=xzzdXs0G194

Then you use the prefix in physics.
http://www.bbc.co.uk/bitesize/higher/physics/units/units/revision/1/
Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


Q5.

Precise values agree with each other; accurate values agree with a true value.
Measurements are said to be precise if they yield very similar results when repeated in the same manner. It can be inferred from the uncertainty.
A measurement is considered accurate if it yields a result that is very close to the true or accepted value. You need to "infer" from the "true value" and then interpret from the uncertainty.
Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


Q15

I think you don't know how a couple works.
It would be good that you learn from the basic.
http://physicsnet.co.uk/a-level-physics-as-a2/mechanics/moments/

Spoiler



Q16

I hope you know how a hydraulics press works. Just in case you don't know, you can watch the video below:
https://www.youtube.com/watch?v=AtQ1oh09Uyo

Pressure is transmitted through the incompressible liquid.
The pressure that is generated by pressing the brake pedal is transmitted to the piston.

Spoiler

Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


Q17

You may want to pose what is the problem that you have with this question. It is about using the formula of torque many times and identifying which is clockwise moment or anticlockwise moment.


Q24

This question you need to be careful.
9702_w16_p12_q24_01.JPG
From the picture, you should be able to identify the x values.


Q26

Can convert 5 ms in terms of period.
And note that point P takes T/2 period from -1.0 mm to +1.0 mm.

Spoiler

Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


Q31

Since the oil drop is held stationary, the electric force acting on it must balance the weight of the oil drop.
Equate them and rearrange the equation to find out the charge-to-mass ratio.


Q32

This question is expecting you to apply Kirchhoff’s current law:
The sum of the currents entering any point in a circuit is equal to the sum of the currents leaving that same point.

And then the definition of current :

I=Qt I = \dfrac{Q}{t}
Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


Q34

The internal and external resistors are connected in series, this means that current in the internal and external resistors are the same.

There are a few formulas that you learn in practical electricity concerning power, resistance, current and potential differences. Use one of them to write the fraction.

Spoiler



Q37

The 2.0-Ω resistor and 6.0-Ω resistor are connected in parallel, so they should have the same p.d. across them. Using this info, you should be able to find the current in the 6.0-Ω resistor.
Then you can find the total current in the current which is equal to current I delivered by the power supply.
Next you can find the p.d. across the 1.5-Ω resistor using the total current and then sum up the p.d. across the 6.0-Ω resistor and p.d. across the 1.5-Ω resistor to find the voltage V.
Original post by Eimmanuel
Q31

Since the oil drop is held stationary, the electric force acting on it must balance the weight of the oil drop.
Equate them and rearrange the equation to find out the charge-to-mass ratio.
I tried but cant get it ......

Q32

This question is expecting you to apply Kirchhoff’s current law:
The sum of the currents entering any point in a circuit is equal to the sum of the currents leaving that same point.

And then the definition of current :

I=Qt I = \dfrac{Q}{t}


How to get 10C?
Original post by Eimmanuel
Q17

You may want to pose what is the problem that you have with this question. It is about using the formula of torque many times and identifying which is clockwise moment or anticlockwise moment.


Q24

This question you need to be careful.
9702_w16_p12_q24_01.JPG
From the picture, you should be able to identify the x values.


Q26

Can convert 5 ms in terms of period.
And note that point P takes T/2 period from -1.0 mm to +1.0 mm.

Spoiler




For Q17 yes I ve tried the formula but still cant get 120Nm .......
Original post by rosemariechua
For Q17 yes I ve tried the formula but still cant get 120Nm .......



You have to pose your working to know what is wrong with your calculation.

More hints:
You don’t need to calculate the torque due to the two 20 N-force.

So there are left 3 pairs of forces. They form couple of moment. You can use the couple formula in Q15 to simplify the calculations.

Only one pair of forces is giving anticlockwise moment of forces.
Original post by rosemariechua
How to get 10C?


I assume that you are talking about Q32. What is the magnitude of current in R? You need to apply the following to find the current.

The sum of the currents entering any point in a circuit is equal to the sum of the currents leaving that same point.
Original post by rosemariechua
Q4,5,15,16,17,24,26,31,32,34,37
help me pleasee


It would be good that you always post your working if you have done any of the questions and gotten the wrong answers.

Students learn MORE from the mistakes that they makes.
HI for Q24 right i got 8/8 and 17/8 why not correct?
Original post by Eimmanuel
You have to pose your working to know what is wrong with your calculation.

More hints:
You don’t need to calculate the torque due to the two 20 N-force.

So there are left 3 pairs of forces. They form couple of moment. You can use the couple formula in Q15 to simplify the calculations.

Only one pair of forces is giving anticlockwise moment of forces.


Hi so sorry i reaally cant see the 3 forces . u meant one pair of forces is giving anticlockwise moment of forces means the 70N? But the wouldn it be 140N? CAuSE 70*2m?

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