A heating coil is labeled 100watt, 220volt. the coil is cut into half and the two pieces are joined in parallel to the same source. the energy now liberated per second
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resistance of coil is
R = V²/P
= 220×220÷100
= 484 ohm
when it cut into two half
resistance of each = R/2
= 242 ohm
when they joined in //
then
equivalent resistance = 121 ohm
P = V²/R
now voltage = V/2 =110
and R = 121
P = 100watt
is it the answer?
R = V²/P
= 220×220÷100
= 484 ohm
when it cut into two half
resistance of each = R/2
= 242 ohm
when they joined in //
then
equivalent resistance = 121 ohm
P = V²/R
now voltage = V/2 =110
and R = 121
P = 100watt
is it the answer?
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