A wire of resistance 5.6 ? is connected to a battery whose emf ? is 4.0 V and wh

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

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