Vikash Jaiswal on 2009-03-01 17:09:09 wrote,

10 galat hai pakka
relation hota hai
mobility=(charge/mass of electron)* time of exitation to recombination
so, it depends on weight not on energy
plz check it

Chandra Bhushan on 2009-03-01 17:48:41 wrote,

@ vikas jaiswal,
hole is nothing but equivalent to electron(in mass and charge) but it is +vely charge. So here u should not think about the mass. The only thing here matters for mobility is that electrons are free in conduction band whereas holes are tightly bound in Valence band. The ans is correct my dear.

kunwar bahadur on 2009-03-06 18:14:11 wrote,

woo....... what a good questions
it is really good approach to understand the topics
thoroughly specially about semiconductor basics.

Ramya Shree on 2009-04-25 18:02:57 wrote,

Its always good to know the basic concepts :)

Soonu Verma on 2009-05-06 08:33:03 wrote,

its really helpful for basics, thanks for the xam

shivangi verma on 2009-05-12 07:57:51 wrote,

Good effort .. thnkx to that persn who prepared this:-)

pooran lal gupta on 2009-05-31 18:23:37 wrote,

good QQQQQQQQQQ

devendra maurya on 2009-06-13 18:24:53 wrote,

its good for testing knowledge

mohan krishna on 2009-07-22 13:49:42 wrote,

well it's good

sudhir crazystar on 2009-07-26 07:41:13 wrote,

i do not expect anything about tthis but it was really a good one to test our iq

anshul shrivastava on 2009-08-01 16:14:31 wrote,

Nice site for engineers

Shailendra Kumar on 2009-08-04 10:04:23 wrote,

Realy best work done by you allllllll

vivek srivastava on 2009-08-06 10:55:44 wrote,

i'm also confused in question no. 10 plz make it more clear

sujata roy chowdhury on 2009-08-24 15:07:06 wrote,

gd one..

anupriya bansal on 2009-09-15 13:54:18 wrote,

nice one.its gud to check ur knwldge...

Gabiriel Robinson on 2009-09-22 02:28:53 wrote,

That's help of Examination

abhay srivastava on 2009-10-07 09:44:41 wrote,

That is a nice practice

Subramaniam Saminathan on 2009-10-20 05:00:53 wrote,

ya its very useful.......

Mantu Bisen on 2009-11-21 18:17:27 wrote,

its cool..........to use mind and with patience...

MD SADIQ on 2010-07-16 16:33:22 wrote,

KEEP GOING BUDDY......

Abhay Verma on 2010-08-26 06:49:44 wrote,

good for testing our knowledge

rahul juneja on 2010-08-31 02:23:09 wrote,

i'ii try to do better next time

Murali dharan on 2010-10-01 16:40:57 wrote,

superrrrrrrrrrrrrrr

Murali dharan on 2010-10-01 16:40:58 wrote,

superrrrrrrrrrrrrrr

sumit kumar on 2010-10-25 02:43:10 wrote,

verrrrrrrrrrr...............

sateesh kumar on 2010-11-03 04:14:59 wrote,

i think mobility also depends on mass of the charged particle pls check it once

ADITYA KUMAR DWIVEDI on 2010-11-12 08:11:57 wrote,

good job boss

ADITYA KUMAR DWIVEDI on 2010-11-12 08:27:47 wrote,

it makes good practice of concepts
thank you!

Gobinath S on 2010-12-01 00:23:09 wrote,

fine.. i am expecting more questions from this chapter

geetika chugh on 2010-12-19 23:51:49 wrote,

niceeeeeeeeeeeeeee.............

VASU REDDY on 2010-12-24 00:58:30 wrote,

nice, the mobility of e- s is greater than holes because of less mass of an e-, pls check it

Siddique Akbar on 2011-01-01 04:59:04 wrote,

Q:2 conduction electrons are thermaly generated es so both are the same

abhishek kumar on 2011-01-06 00:52:55 wrote,

good test

Ashish kumar Sinha on 2011-01-11 01:12:43 wrote,

thankkkkkkkks

pandari k on 2011-01-25 05:31:36 wrote,

thanks, i very much satisfied with test

pandari k on 2011-01-28 02:16:10 wrote,

thank u

siva kumar reddy on 2011-02-10 02:28:13 wrote,

it may useful for us.......

Niroj Kumar Dash on 2011-02-11 20:49:47 wrote,

Thank U
Its really nice....

usha nagaraj on 2011-02-22 00:15:20 wrote,

Realy good this quesion
Thanks

Bhupender Soni on 2011-02-23 01:27:51 wrote,

Nice Test

VASU REDDY on 2011-02-25 21:49:33 wrote,

GOOD

radha radha on 2011-02-27 04:31:57 wrote,

I hope it is a great creation .............And Really useful.....Thank U.

dear dalfin on 2011-03-04 16:43:34 wrote,

its really help me to check my knowledge.....
thankssssssss

waheed hayat on 2011-03-14 07:37:44 wrote,

first time

shilpa vekariya on 2011-03-22 05:48:54 wrote,

amazing... use to spend abt 2 houra a day to gain....

nothing to loose here...

keshav kumar on 2011-04-11 00:56:54 wrote,

mind freakins questions..........

Kerin Joseph on 2011-04-17 01:24:40 wrote,

hmm ..10 iz wrong ..bt waz a gd test ..:-)))

jappi singh on 2011-04-18 10:01:13 wrote,

thanks for a nice test

govinda nahak on 2011-04-24 08:08:26 wrote,

it's really good for me...nyc site i have got..it's really wonderfull

Strive Force on 2011-04-26 04:58:50 wrote,

doubt on qs no.10....not clear!!

Anushka Pareek on 2011-04-29 09:07:05 wrote,

i know d mobility of ele's z greatr dan holes. bt accord 2 ma knowledge....if v think practically...hole doesnt exist.where ele is nt present,v call dat hole.thn y dis mobility difference b/w holes nd electrns???

gopal manda on 2011-05-01 05:20:29 wrote,

get confidence to did this

Anushka Pareek on 2011-05-03 02:55:31 wrote,

hey cn nybdy tell me ma ans..??plz..

Arvind r on 2011-05-08 04:32:10 wrote,

good test, thankz buddy.... nice passtime for my summer dayz.. cool site.

Arvind r on 2011-05-08 04:33:52 wrote,

good test, thankz buddy.... nice passtime for my summer dayz.. cool site.

amit jha on 2011-05-08 04:51:38 wrote,

nice work keep doing........

raj singh on 2011-05-31 06:45:59 wrote,

it's a cool site for time pass

rashtra gaurav on 2011-06-01 19:53:28 wrote,

very helpfull 4 d guy like me.....
book irritate me vry much now.

you ajay on 2011-06-03 03:30:12 wrote,

good thaq

devankur mishra on 2011-06-06 13:12:39 wrote,

NICE LIBRARY F QUES

GANESH ANNAMALAI on 2011-06-14 01:08:30 wrote,

VERY FINE TEST....

deepali nikam on 2011-06-21 05:16:06 wrote,

thanks.........it is very usefull to check our knowledge

Naveen Nalli on 2011-07-16 02:52:08 wrote,

good work ...it makes us better .

vatsa rao on 2011-07-26 04:14:31 wrote,

good one......

vatsa rao on 2011-07-26 04:14:33 wrote,

good one......

Dnyanu Marode on 2011-07-28 06:08:08 wrote,

great! Best to chack & improve our knowledge. Thanks!

jeevitha sri on 2011-07-29 05:40:45 wrote,

tanq u for ur effort to make this website which will def help the students in getting good knowledge abt basics.....

Chandan Kumar on 2011-07-30 01:46:52 wrote,

Very interesting....
Dimag ki Batti jal gai...!!!!!!!

Ramesh Sinha on 2011-08-04 02:30:42 wrote,

I HVE DOUBT wITH QUESTION NUMBER 10.
ACCORDING TO ME ANSWER WILL BE C.
electrons have less effective size than that of holes(which actually are not real)...formula says
m(mobility)=drift velocity/electric field=et/m where t is relaxation time..
so mobility is inversely proportional to mass
hence e has more mobility.

plz correct it or send ur argument . thanks

neeraj singh on 2011-08-05 01:23:41 wrote,

1st trial nice one though

ram gupta on 2011-08-15 02:02:31 wrote,

good one...

prem kumar on 2011-08-17 02:29:53 wrote,

it s k

Amit Gupta on 2011-09-10 05:28:08 wrote,

Very Good Site to check your knowledge and improve it...............

vishnu vardhan on 2011-09-13 04:51:27 wrote,

nice questions.....but hve 2 do well

vishnu kant badal on 2011-09-23 14:24:07 wrote,

good collection of questions,,these questions give basic idea how to prepare.?

vinay upadhyay on 2011-09-27 20:38:52 wrote,

really interesting.......nice time pass

vinay upadhyay on 2011-09-28 05:17:12 wrote,

good choice

<indu > on 2011-09-28 05:18:54 wrote,

really great to do basics of electronics after 3 years and got 90% :) thanks chandra for this test

pradeep gautam on 2011-10-05 05:21:53 wrote,

TPM chod do to acchi teyyari hogi.......

anupma gupta on 2011-10-08 02:31:24 wrote,

I will try next time.............

imran husain on 2011-11-02 03:56:09 wrote,

gooooooooooooooooooood

Suresh N on 2011-12-17 21:17:10 wrote,

Ok need to try more

ARVINDKUMAR SINGH on 2012-01-16 10:20:08 wrote,

good one but need some accuracy

jiyamary joseph on 2012-01-27 22:58:01 wrote,

gud

sanjay kumar on 2012-02-20 06:29:19 wrote,

good

veeranna hooli on 2012-02-27 03:09:28 wrote,

Thank a lot leaving this kind of test in the net. This will help to imporve themselves

ramzik luikham on 2012-02-27 09:35:26 wrote,

is 70% good enough!

ramzik luikham on 2012-02-27 09:36:08 wrote,

is 70% good enough!

Shubhendu Rajak on 2012-03-20 10:42:56 wrote,

nice way to prepare for competitive exam.Need more question like this.

Vinoth Balaraman on 2012-03-25 11:20:44 wrote,

thank u.....!

jagdish Tak on 2012-03-30 11:22:46 wrote,

i think question no 10 is wrong,because it depends on weight of electron.

Munna Prasad on 2012-04-01 03:04:08 wrote,

quistion no. 10....
mobilty of an carrier depends upon the its mass..electrons are lighter than
holes....as result the answer suggested is not correct...any body coment plz..