Pls answer question 2
Attachments:
Answers
Answered by
1
yes R will be the answer .....
Attachments:
olivia77:
R is the answer but idk how
make a circle, two semicircular arcs will be 2 ohms each
make a diameter, and then both arcs will be in parallel
so 2R & 2R are in parallel
so R is your answer :)
Ohh right
Thanks a lot!
I don’t know why I was confused the answer was so easy to find
no problem :)
it's ok now
Answered by
0
R=pl/a (where p is specific resistivity,l is length,a is thickness,and R is its resistance)
4R=pl/a
l=4Ra/p
>>On changing wire into circle only it's length become circumference, and nothing happens to it's thickness and resistivity
>>l=2πr
>>l=πd. { since 2r=d}
>>l=πd=4Ra/p
>>l=d=4Ra/pπ
Now, new resistance
By formula,R=pl/a
R=p*4Ra/pπa=4R/π
Answer : 4R/π
Similar questions