tasurcdT-Phone & Tablets are not to be used as calculators. BE NEAT. Solve probl

Question

tasurcdT-Phone & Tablets are not to be used as calculators. BE NEAT. Solve problems in allotted area. of charge in 5s to a stereo tape player. a) What is the electrical current flowing into the device? b) Calculate the work done by the battery c) What is the total amount of energy stored in a 12-V, 92Amp.hr car battery when fully charged? d) The resistance of a copper wire 2500 cm long and 0.90 cm in diameter is 0.67 Oh 20 degrees Celsius. What is the resistivity of copper at this temperature? 4 points

Explanation / Answer

a) current = charge / time

= 20 / 5 = 4 A

b) W= IVt = 4*12*5 = 240 J

c) E = IVt = 12*92*60*60

= 3974400 J

d) R = pL/A

p = RA/L

= 0.67*pi*(0.0045)^2 / 25

= 1.7*10^-6 ohm / m

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