Question

four circuits are shown below all the batteries are the same voltage v and all resistors have the same resistance are in which circle does the battery deliver most power​

Answer 1

Answer:

2nd

Explanation:

Power = V×I

acc. to Ohm's Law

V/I = R

So I = V/R

replacing in first formula

Power = V^2/R

Hence , power will be most in case where resistance is least since voltage is same in all .

Least resistance in 2nd . Hence 2nd is the answer .

Answer 2

Explanation:

To deliver more power resistance should be less

Option 1

Total resistance =》 1/R = (1/R +1/2R) + R

=》 1/R = 3/2R +R

=》 R = 5R/3

Option 2

1/R = 1/R + 1/2R

=》 R =2R/3

Option 3 and 4 u can solve or they are not needed because resistance is lowest for second option.