CBSE PHYSICS 2009 (DELHI REGION)

I always had a doubt in this,someone plz answer

i think its a direct application of ampere's circuital law naa........

yaar paper bahut lengthy tha....wat lag gayi.....

JITNA CHEM KA DE KAR KHUSH THA UTNA HI PHYSICS NE RULAYA.....

@AKAND....

YAR BY THAT ONLY MAGNETIC FIELD IS ZERO....

MAGNETIC FIELD TO WAHAN BHI ZERO HOTI HAI JAHAN DO MAGNETIC FIELD LINES OPPOSE KAREIN.....

hmmmmmmmmm.........[12][12][12][12][12]..........

guys pleasse try yaar....

yaar mere thread to gaya..koi reply karne wala nahin....

guys answer it.....

opsie.. sorry... kal reply karta hun.. nind aa rahi hai....

hmmmmm...........i will try to answer it.....but u answer my question first.....
Is solenoid closed object???????
Is toroid closed object?????

I think u will get answer by considering them.....

The magnetic field due to the wound wires gets cancelled in case of toroid , but not in the solenoid... correct it if i am wrong!!