A heating coil takes 8 minutes to boil a quantity of water electrically. now the heating coil is cut into two equal part which are joined in parallel to each other. this parallel combination will heat the same quantity of water in
Answers
Answered by
12
when coil is divided into two parts of equal length and connected in parallel then new resistance of coil will be
R' = R/4
as R is directly proportional to length.
heat = I^2RT....where T =8....... (1)
FOR SAME CURRENT FLOW
TIME TAKEN
= 4H/ I^2*R...EQN (2)
dividing both eqn we get
8/T = 1/R X R/4
T = 32 min
HOPE IT WILL HELP YOU
R' = R/4
as R is directly proportional to length.
heat = I^2RT....where T =8....... (1)
FOR SAME CURRENT FLOW
TIME TAKEN
= 4H/ I^2*R...EQN (2)
dividing both eqn we get
8/T = 1/R X R/4
T = 32 min
HOPE IT WILL HELP YOU
Similar questions