Phiscis Paper 1 Questions :D

[1992]

I need help on O/N 2003 Q.28 and Q31
Also need help on M/J 2004: Q6 / 11 / 21 /23 / 25 and 26. i find them very tricky

 

[ashhadazam]

Nov 03..Q.28 !! Using the formula dsina=n x wavelength, find the second order maxima..
dont forget to do the conversions. u should get the angle for 2nd order 48.6 .. now subtract 22 from it u get the angle between the two..26.6.. option B

 

[ashhadazam]

Nov 03 .. Q.31 ) Find the total current.. I=V/R ..
I=12/4 = 3A ... 4 is the combined resistance of the circuit
Now see how much is being used by the 2ohm resistor .its 6V . the remainig 6 V is being supplied to the parallel system. Find the currnt by V/R
6/6 = 1A . so its option A

 

[ashhadazam]

June 04. Q6) Calculate individual percntage uncertainties. FOr currnt it is (0.05/2.50) x 100 .it gives u 2percent. for resistance u r given 2prcent.. The formula is I^2 x R . so u need to multiply th uncertainty of current by 2. The answer u get is 2(2) plus 2 which is 6percent

 

[ashhadazam]

Q.11 june 04 ) this one is very simple.. U juss need to find mmentum of both and subtract cuz they are in opposite direction !!!

for 21 u r given mass the 1/V . . Density = M x 1/V
Density of P = MpNp which is greater than density of Q = MqNq

 

[ashhadazam]

Q.23 june 04) F=Stress x A .
Find the area.. radius = 0.0005m find the area by pi r^2 . Multiply this area by strss given and u get force of abt 785 N.. which lies in the range of Option C

Q.25) As the wave is moving towards left the point will move in the direction of the wave.. the next point for P is therefore downwards.. Point Q is stationary ..s its option A

Q.26)for question number 26, yu hav to make out the relationship I x S^2 =E/T
as the amplitude is doubled the intensity is nw 4. so E/T = 4/2E which is equal to 2E ..option B