Answer key for the ISRO Paper 2012 (SET A) :
1. A
2. B
3. A
4. C
5. C
6. D
7.B
8. C
9. A
10.B
11.D
12.
13.C
14.B
15.B
16.A
17.
18.B
19.A
20.D
21.A
22.D
23.C
24.D
25.B
26.B
27.C
28.B
29.B
30.B
31.A
32.B
33.B
34.D
35.A
36.C
37.B
38.D
39.C
40.B
41.D
42.
43.C
44.C
45.
46.B
47.C
48.A
49.
50.C
51.
52.B
53.A
54.
55.A
56.
57.D
58.B
59.D
60.B
61.
62.
63.B
64.C
65.C
66.
67.C
68.C
69.B
70.D
71.A
72.C
73.C
74.A
75.B
76.C
77.D
78.A
79.C
80.D
If guys have doubt regarding the solution please post your comment , i will try to send you the solution.
1. A
2. B
3. A
4. C
5. C
6. D
7.B
8. C
9. A
10.B
11.D
12.
13.C
14.B
15.B
16.A
17.
18.B
19.A
20.D
21.A
22.D
23.C
24.D
25.B
26.B
27.C
28.B
29.B
30.B
31.A
32.B
33.B
34.D
35.A
36.C
37.B
38.D
39.C
40.B
41.D
42.
43.C
44.C
45.
46.B
47.C
48.A
49.
50.C
51.
52.B
53.A
54.
55.A
56.
57.D
58.B
59.D
60.B
61.
62.
63.B
64.C
65.C
66.
67.C
68.C
69.B
70.D
71.A
72.C
73.C
74.A
75.B
76.C
77.D
78.A
79.C
80.D
If guys have doubt regarding the solution please post your comment , i will try to send you the solution.
thankz very much...
ReplyDeletehows it possible to get 78db for qn.53 pls reply
ReplyDeleteHi Sheena,
DeleteTo calculate the gain for parbolic dish antenna we use the below formula.
g=(sq(pi)*sq(D)*effiency)/sq(lamda)
where D is diameter and lamda is wavelength.
Please substitute the values .you will get the answer.
shouldn't 19th ans be d.) cuz phase error won't result in frequency variation rather just phase distortion
ReplyDeleteis it the answer of EC paper or Mech paper. I need the answer key of Mechanical papers of 2013,2012,2011,2009,2008.
ReplyDeleteSiba,
DeleteThis blog is dedicated to electronics students only.
kindly send all the ans key for Isro 2007, 2008.2009,2010,2011.2012,2013 for mechanical stream @princek59@gmail.com
ReplyDeleteplz upload the ans key for isro ece qs from 2007 to 2010,2013
ReplyDeleteHi Harry, what is the answer of the 12 question in the ISRO paper of 2012
ReplyDeletehi i need answer key of isro mechanical paper 2012
ReplyDeleteAkshay
DeleteI can only provide the solutions for ECE papers..sorry
hi harry can u please send me the solutions of 2012,2013 Electronics paper solutions. my mail id is sourajit19@gmail.com. it wud be of great help buddy... thanks..
ReplyDeleteans. of 51 should be a.
ReplyDeletein a. overall noise figure is 3.5
in b. overall noise figure is 3.63
hence min. is 3.5 .
Hi Harry,
ReplyDeleteThe answer to 39th question should be A.Divergence is defined as net outflow of a field from the substance. This scenario is satisfied by A but C can also satisfy that scenario as there is no field entering or leaving the conductor.
Its tricky but other posts show its answer as A.
It would be good to your audience if you provide explanation to this answer.
Great job
Hi ,
DeleteIn a simple words i can say divergence is nothing but the leakage.
When ever flux or the field will flows out the in any closed surface divergence will be positive.When you see the 1 and 2 diagram , there is net outward flow of flux so....net divergence is positive is both the case. While in third it is zero.
Divergence is zero when net inward flux and outward flux are equal (+ ve, -ve). That's why divergence of magnetic field is zero (integral B.ds=0). In option A flux is entering and leaving so divergence of A is zero I think.
Deletefor q.no.43 ans is D...
ReplyDeleteVishwanath...
DeleteWhen transmission line will terminate in the to load which is same of the characteristic .... No power or energy will be reflected...So every input will be observed. same as maximum power transfer theorem .
So reflection coefficient(T) will be 0
And VSWR=(1+T)/(1-T)=1.
VSWR is 1 that is correct. But they asked which is the wrong option!!!! so ans is option D
Deletefor Q.no.31..ans is C not A(it is characteristic impedence not intrinsic impedence)..
ReplyDeleteIn question it is being asked about the characteristic impedence only so... answer is correct.
Deletei want answers for 2012 part-A for ISRO Papers?
ReplyDeleteHi Rudra,
DeleteI have uploaded the paper as well as the solution also.
All sets have the same paper , so you can refer the question uploaded for 2012 and solution for the same.
what is the answer of ques no.12?
ReplyDeleteHello ,
ReplyDeleteAns of first Question is Right? Option A ... it might be Right answer Option C
One suggestion: please mention the branch at the top (ME/ ECE etc.)
ReplyDeleteAbs for question 49?
ReplyDeletequestion 22 ka solution upload kro koi ,,,, answer should be 1
ReplyDeleteSir...please upload solution of 17
ReplyDeletekindly send all the ans key for Isro 2007, 2008.2009,2010,2011.2012,2013 for mechanical stream
ReplyDeletemail id seshuandamma@gmail.com
PLz forward them at anujtanwar1215@gmail.com
DeleteHi Hari...
ReplyDeleteI really appreciate the effort.
But I find that you are contradicting yourself in the detailed solution with some of the solutions given above.
Thanks and regards !!
many of the given answer are wrong
ReplyDeleteThis comment has been removed by the author.
ReplyDelete20th question answer AM efficiency cannot be 100%. D cant be corrrect
ReplyDeleteq.37 Ex and Ey are not equal. so cannot be circular polarized.ans should be elliptical
ReplyDeleteq.38 also left circular wave is reflected back perfectly so RHcircular polarization
ReplyDeleteCan u give the link for solutions?
ReplyDelete