10) At the same is applied at the ends of each wire. The wires may differ in: te

Question

10) At the same is applied at the ends of each wire. The wires may differ in: temperature, two wires made of pure copper have different resistances. The same voltage Circle all that apply. (5 points) length cross-sectional area. resistivity. amount of electric current passing through them 11) The battery for a certain cell phone is rated at 3.70 V. According to the manufacturer it can produ 1.60*10* J of electrical energy, enough for 5.55 h of operation, Find the average current that this cell phone draws when turned on. ce before needing to be recharged.

Explanation / Answer

10) R = rh0 L / A

rho is same for both but R is different, henece

length and cross sectional area may be different.

and I = V / R

V is same but R is different so current will be different.

Ans: length, cross sectional area, current

11) P = energy / time

P = (1.60 x 10^4) / (5.55 x 3600)

P = 0.80 W

P = V I

0.80 = 3.70 I

I = 0.216 A

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