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Physics Paper 12/MJ/2015 Answers and Questions!

Aly Emran

Aly Emran

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Here are almost all of the question of Yesterday's paper:
The answers mentioned are 100% confirmed correct answers.... You can now discuss... More than 24hrs have passed...

Q1. Which defination is correct and uses only quantities rather than units?(C)

Q2. Formula E=3/2kT is given where E is kinetic energy, k is a constant and T is temperature. What are the units of K?(kgm^2s^-2K-1)

Q3. The diameter measured by micrometer screw gauge is (0.80+-0.02)mm. The instrument contains zero error of (-0.2+-0.02)mm. What is the percentage error involved?

Q4. An ammeter measures current... The scale becomes less sensitive on high currents and when the current is zero, the reading on ammeter is still present. Which graph is correct?

Q5. The vector R was given. Which vector diagram is not correct?(C)

Q6. Student records the value of height and time to determine the value of free fall acceleration. Which result will provide value of acceleration greater than 9.81ms-1?(D)

Q7. Which ranges of current and pd is correct?(D)

Q8. A body covers 100m distance. It starts from rest and accelerate withe value 2.5ms-2. After reaching the speed of 10ms-1, the body moves with constant speed. What is the time taken?(C)

Q9. A stone is thrown from the top of the building. Which graph for vertical velocity is correct?

Q10. Rocket burns fuel for 5s. After 5s, it moves constantly. Which statement is correct?

Q11. Which statement related to momentum is correct?(D)

Q12. A stone is thrown near the moon. What is correct about vertical and horizontal force?(horizontal zero, vertical constant C)

Q13. Which diagram correctly shows the directions of forces P, W and R acting on the ladder as it begins to slide?(B)

Q14. What is the height of the mountain of granite?(B)

Q15. Which statement about the change in energy of water as it moves from X to Y is correct?(D)

Q16. Which row correctly describes the orderi g and motion of molecules of water and ice at 0 degree?(A)

Q17. Block is tilted 90 degree and thrown down from 0.8m height. What is the potential energy?(C)

Q18. A fish of mass 250g is raised to 1.8m height. It gains speed of 1.1ms-1. What is the total energy?(D)

Q19. Water flows at 500kgs-1... Turbine uses 200A and 6000V. What is the percentage error involved?(D)

Q20. Book provides force to the table. What force do table provide to the book?(D)

Q21. What is the phase difference between two waves of same frequency?

Q22. What is the path difference between two waves away from each other at 60 degree? (B)

Q23. A stationary wave is formed between S and P. When detector is moved between S and P, what happens?(B)

Q24. Where on graph would elastic limit be found? (Just beyond S)

Q25. Which quantity is not directly measured to calculate Young's modulus?(the one which involved finding diameter)

Q26. Which observable change will not affect the interference?(somewhat like this)(C)

Q27. Which row states Kirchoff's first law and the name of the quantity that is conserved?(A)

Q28. What is the minimum and maximun potential difference? (Min-2 qnd Max-5)

Q29. What is the value of current I?(A)

Q30. Which statement related emf and current is not correct?(A)

Q31. What is true about power dissipation of cell?

Q32. Which diagram shows the correct direction of charges? (B)

Q33. What is the formula of n placed between two metal plates? (B)

Q34. The stress is reduced is directly proportional to thickness of wire w. When w is halved, what is the stress?

Q35. Which graph of change in resistance and extension is correct?(A)

Q36. Which statement is correct( the one that involved diffraction and minimas and maximas were formed)(B)

Q37. What conclusion can be drawn from the results of the experiment of gold foil?(A)

Q38. When Beta particle is emitted, what does not change in a nucleus?(C)

Q39. 238U92 is converted to 234U92... Which type of particles were released during the reaction?(1 alpha and two beta)

I dont remember the last question :p



 
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Quizzical Nuts

Quizzical Nuts

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This was the worst paper ever. I didn't have time to even shade 2 questions. Really upsetting. Hope the threshold is 25-26.
 
Choi WW

Choi WW

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Student records the value of height and time to determine the value of free fall acceleration. Which result will provide value of acceleration greater than 9.81ms-1?(D)

Did they ask for greater value????
 
Aly Emran

Aly Emran

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Choi WW said:
Student records the value of height and time to determine the value of free fall acceleration. Which result will provide value of acceleration greater than 9.81ms-1?(D)

Did they ask for greater value????
Click to expand...
Yea. They did say greater than 9.81... I had to make this equation g=2H/t^2 and then answer it.
 
princess Anu

princess Anu

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Q19..'the percentage error involved'?(D)

Did they really ask for the % error? Or the efficiency ? o_O
 
D

DDanielAWE@

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Guyz what was WIDTH 2w or square root 2 . And for coherence or diffraction and interference. I think it should be coherent becauze first step is coherent , second step is DIFRACTION and interference
 
asadalam

asadalam

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Aly Emran said:
Here are almost all of the question of Yesterday's paper:
The answers mentioned are 100% confirmed correct answers.... You can now discuss... More than 24hrs have passed...

Q1. Which defination is correct and uses only quantities rather than units?(C)

Q2. Formula E=3/2kT is given where E is kinetic energy, k is a constant and T is temperature. What are the units of K?

Q3. The diameter measured by micrometer screw gauge is (0.80+-0.02)mm. The instrument contains zero error of (-0.2+-0.02)mm. What is the percentage error involved?

Q4. An ammeter measures current... The scale becomes less sensitive on high currents and when the current is zero, the reading on ammeter is still present. Which graph is correct?

Q5. The vector R was given. Which vector diagram is not correct?

Q6. Student records the value of height and time to determine the value of free fall acceleration. Which result will provide value of acceleration greater than 9.81ms-1?(D)

Q7. Which ranges of current and pd is correct?

Q8. A body covers 100m distance. It starts from rest and accelerate withe value 2.5ms-2. After reaching the speed of 10ms-1, the body moves with constant speed. What is the time taken?(C)

Q9. A stone is thrown from the top of the building. Which graph for vertical velocity is correct?

Q10. Rocket burns fuel for 5s. After 5s, it moves constantly. Which statement is correct?

Q11. Which statement related to momentum is correct?(D)

Q12. A stone is thrown near the moon. What is correct about vertical and horizontal force?

Q13. Which diagram correctly shows the directions of forces P, W and R acting on the ladder as it begins to slide?(B)

Q14. What is the height of the mountain of granite?

Q15. Which statement about the change in energy of water as it moves from X to Y is correct?(D)

Q16. Which row correctly describes the orderi g and motion of molecules of water and ice at 0 degree?(A)

Q17. Block is tilted 90 degree and thrown down from 0.8m height. What is the potential energy?(C)

Q18. A fish of mass 250g is raised to 1.8m height. It gains speed of 1.1ms-1. What is the total energy?(D)

Q19. Water flows at 500kgs-1... Turbine uses 200A and 6000V. What is the percentage error involved?(D)

Q20. Book provides force to the table. What force do table provide to the book?(D)

Q21. What is the phase difference between two waves of same frequency?

Q22. What is the path difference between two waves away from each other at 60 degree? (B)

Q23. A stationary wave is formed between S and P. When detector is moved between S and P, what happens?(B)

Q24. Where on graph would elastic limit be found? (Just beyond S)

Q25. Which quantity is not directly measured to calculate Young's modulus?(the one which involved finding diameter)

Q26. Which observable change will not affect the interference?(somewhat like this)(C)

Q27. Which row states Kirchoff's first law and the name of the quantity that is conserved?(A)

Q28. What is the minimum and maximun potential difference? (Min-2 qnd Max-5)

Q29. What is the value of current I?(A)

Q30. Which statement related emf and current is not correct?(A)

Q31. What is true about power dissipation of cell?

Q32. Which diagram shows the correct direction of charges? (B)

Q33. What is the formula of n place between two metal plates? (B)

Q34. The stress is reduced is directly proportional to thickness of wire w. When w is halved, what is the stress?

Q35. Which graph of change in resistance and extension is correct?

Q36. Which statement is correct( the one that involved diffraction and minimas and maximas were formed)(B)

Q37. What conclusion can be drawn from the results of the experiment of gold foil?(A)

Q38. When Beta particel is emitted, what does not change in a nucleus?(C)

Q39. 238U92 is converted to 234U92... Which type of particles were released during the reaction?(1 alpha and two beta)

I dont remember the last question :p


Click to expand...
Q4 was D,the one that started straight but ended up going upwards with increasing gradient.
Q5,im sure it was C,the one with 2 perpendicular force of similar length with strange directions.
Q14,i think it was B or C,just had to use pgh.
Q31 it was A
Q32,wasnt it A?The one that had arrows from Positive into negative?Im sure that diagram was A.
Q35 it was A i think,above x axis and exponential type
Q38 wasnt it B?Number of nucleons or smthing like that?
Q39 was B
Total have doubt/wrong in 7 Qs. 3,4,10,12,21,34,38.All others are 100% IA.Hopefully GT will be less than 30 IA.
 
Aly Emran

Aly Emran

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asadalam said:
Q4 was D,the one that started straight but ended up going upwards with increasing gradient.
Q5,im sure it was C,the one with 2 perpendicular force of similar length with strange directions.
Q14,i think it was B or C,just had to use pgh.
Q31 it was A
Q32,wasnt it A?The one that had arrows from Positive into negative?Im sure that diagram was A.
Q35 it was A i think,above x axis and exponential type
Q38 wasnt it B?Number of nucleons or smthing like that?
Q39 was B
Total have doubt/wrong in 7 Qs. 3,4,10,12,21,34,38.All others are 100% IA.Hopefully GT will be less than 30 IA.
Click to expand...
Yea even I marked C.. Dunno if its correct or not
Q14 was B i guess... Yea just pgh
Q31 im not sure... I marked that D but there was confusion in A and D
Q32... B had the arrow from positive to negative... A had it from negative to positive... This was a repeat qstn too
Q35 yea i marked thay A too
Q38 yea it was nucleons but I dont remember the correct option
Q39 i dunno :p... I remember 1alpha and 2beta
 
asadalam

asadalam

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Aly Emran said:
Yea even I marked C.. Dunno if its correct or not
Q14 was B i guess... Yea just pgh
Q31 im not sure... I marked that D but there was confusion in A and D
Q32... B had the arrow from positive to negative... A had it from negative to positive... This was a repeat qstn too
Q35 yea i marked thay A too
Q38 yea it was nucleons but I dont remember the correct option
Q39 i dunno :p... I remember 1alpha and 2beta
Click to expand...
32,damn i guess i knew the ans but marked it wrong :/
So total max of 35 if i marked right but remember wrong,and min 32.Still within an A IA
 
asadalam

asadalam

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Aly Emran said:
Yea even I marked C.. Dunno if its correct or not
Q14 was B i guess... Yea just pgh
Q31 im not sure... I marked that D but there was confusion in A and D
Q32... B had the arrow from positive to negative... A had it from negative to positive... This was a repeat qstn too
Q35 yea i marked thay A too
Q38 yea it was nucleons but I dont remember the correct option
Q39 i dunno :p... I remember 1alpha and 2beta
Click to expand...
Stop,wait a minute,i guess the ordering of the questions is off a bit,because all 3 of us got A in Q32(look in the chat) and maybe this question was not 32,and maybe another.Are you 100% positive it was B?Because such a silly mistake seems highly unlikely.
 
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