A wire of resistance 5.6 ? is connected to a battery whose emf ? is 4.0 V and wh
ID: 2279242 • Letter: A
Question
A wire of resistance 5.6 ? is connected to a battery whose emf ? is 4.0 V and whose internal resistance is 0.61 ?. In 2.7 min, how much energy is (a)transferred from chemical to electrical form in the battery, (b) dissipated as thermal energy in the wire, and (c) dissipated as thermal energy in the battery?
(a)
Number
Units
(a)
Number
Units
This answer has no units A wire of resistance 5.6 ? is connected to a battery whose emf ? is 4.0 V and whose internal resistance is 0.61 ?. In 2.7 min, how much energy is (a)transferred from chemical to electrical form in the battery, (b) dissipated as thermal energy in the wire, and (c) dissipated as thermal energy in the battery?Explanation / Answer
current= 4/6.21=0.644
a) energy=pt
ivt=4x0.644x2.7x60secs=417.4 J
b) i^2 Rwire*t= 377.865 j
c) i^2 Rint*t= 40.98 j