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# Physics Chapter 8 Part 1

Topics Covered:

1. Transverse and longitudinal waves
2. speed of sound
3. super position
4. interference
5. beats
6. reflection of waves
7. stationary waves
8. Doppler effect

1. 3(b) 4(b) 5(c) 7(a) 8(b) 11(a) 12(a) 13(c) 14(a) 15(b) 17(c) 18(c) 19(d) 20(c) 23(b) 24(d) 25(a) 26(a) 58(c) 60(d) 64(a) 67(d) 68(a) 69(c) 70(a) 72(c) 73(c) 77(d) 79(c)

2. 1B,2C,3B,4C,5C,6C,7A,8A,9B,10B,11A,12A,13C,14A,15B,16C,17C,18C,19D,20C,21B,22C,23C,24D,25A,26A,27e,28B,29C,30?,31?,32A,33D,34C,35A,36A,37A,38A,39E,40B,41A,42B,43D,44c,45A,46A,47A,48B,49C,50?,51B,52E,53E,54A,55?,56D,57D,58C,59C,60D,61?,62?,63C,64D,65c,66?67C,68A,69C,70B,71D,72D,73D,74C,75B,76C,77A,78A,79B.......... I HOPE MOST OF MY ANSWERS WILL BE CORRECT......

3. ab ye bta da ka mere kitny sahi or ghalat hy....

4. 1b 2c 3b 4b 5c 6b 7a 8a 9b 10b 11a 12a 13c 14a 15b 16c 17c 18c 19d 20c 21b 22b 23a 24d 25a 26a 27d 28d 29? 30c 31? 32c 33d 34d 35? 36a 37a 38a 39e 40e 41a 42c 43d 44b 45a 46a 47a 48b 49b 50e 51b 52e 53e 54a 55e 56e 57b 58c 59d 60c 61a 62? 63c 64d 65d 66d 67c 68a 69c 70b 71d 72? 73d 74b 75b 76c 77same 78a 79b

5. 1b,2c,3b,4b,5c,6c,7a,8a,9b,10c,11a,12a,13c,14a,15b,16c,17c,18c,19d,20c,21d,22c,23c,24d,25a,26a,27e,28b,29a,30d,31c,32a,33a,34b,35a,36c,37a,38a,39c,40e,41a,42b,43d,44c,45a,46a,47a,48b,49c,50e,51b,52e,53e,54b,55a,56d,57a,58a,59c,60b,61d,62?,63a,64d,65c,66?,67a,68a,69c,70a,71?,72d,73d,74b,75b,76?,77c,78a,79b

6. 1b,2c,3b,4b,5c,6c,7a,8a,9b,10c,11a,12a,13c,14a,15b,16c,17c,18c,19d,20c,21d,22c,23c,24d,25a,26a,27e,28b,29a,30d,31c,32a,33a,34b,35a,36c,37a,38a,39c,40e,41a,42b,43d,44c,45a,46a,47a,48b,49c,50e,51b,52e,53e,54b,55a,56d,57a,58a,59c,60b,61d,62?,63a,64d,65c,66?,67a,68a,69c,70a,71?,72d,73d,74b,75b,76?,77c,78a,79b

7. 1b 2a 3b 4b 5c 6b 7a 8a 9c 10a 11b 12a 13c 14a 15b 16b 17d 18c 19c 20a 21d 22a 23a 24b 25a 26a 27c 28d 29d 30a

8. Q1 ans b
Solution in the pictures below
Q2 ans c
Solution in the pictures below
Q3 ans b
Q4 ans b
Q5 ans c . Use v = f lamba
Q6 ans c. Energy is proportional to the square of amplitude.
Q7 ans a.
Q8 ans a.
Q9 ans b.
Q10 ans c.
Solution in the picture below:

9. in first ten questions, these two of u are wrong.
Q6 ans c. Energy is proportional to the square of amplitude.
Q10 ans c.
for 10th see my pic in comment I posted.

10. In first 10 these two are wrong.
Q4 ans b
Q10 ans c.
for 10th see the pic I posted in comment above.

11. Q1 ans b
Solution in the pictures below
Q2 ans c
Solution in the pictures below
Q6 ans c. Energy is proportional to the square of amplitude.
Q8 ans a.
Q9 ans b.
Q10 ans c.
For 10th see the picture I posted in above comment.

12. Q2 ans c
Solution in the pictures below
Q6 ans c. Energy is proportional to the square of amplitude.
Q9 ans b.
Q10 ans c.
for 10th see the solution i Posted in my comment

13. first ten answers are correct . Good work

14. thankew :)

15. check the other also plzzz

16. Q10 i dont understand

18. kya confusion ho rahi ha us me?

19. Are you supposed to make corrections only in the 1st 10 questions........
^No offense whatsoever.....

20. wait for the others, we are preparing the solution .

21. in ques 2.the waves r gvn as
y1=0.25 sin 316t
y2=0.25 sin 310t
but in the ans u used pi...
ye smj nai aya muje....
i know...beats r equal to no of frequency difrnc but sin k sath....i did nt make out the ans....

post remaining ans as sn as possible....

23. general form of an equation is
sin wt
so here w= 316
and w= 2pi f
so 2pi f = 316
This is how pi came in

24. w is rate of change of angle substented by movig paritle ok now if this change reaches to 360 so we can rite 2pi/t=w here theta equal to 2pi

25. Múñêèb Wãqâr14 July 2015 at 15:10

The solution in Q10 is wrong because this is the formula of frequency not velocity