Ques 9 plz

Asked by lovemaan5500 | 22nd Feb, 2020, 10:14: PM

Expert Answer:

If a current i is in a circular path of radius R,
 
magnetic field B at centre is given by,  B = μo i / ( 2 R )  .............(1)
 
Current i due to electron moving in a circle of radius R with speed v , 
 
i = charge /time = ( e v ) / ( 2 π R ) ................(2)
 
Using eqn.(1) and (2), we get magnetic field as, B = ( μo e v ) / ( 4π R2
 
B = ( 4π × 10-7 × 1.602 × 10-19 × 7 × 106 ) / ( 4π × 25 × 10-18 ) = 4.49 × 10-3 T

Answered by Thiyagarajan K | 23rd Feb, 2020, 09:47: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.