ent A circuit is from two batteries and two wires, as shown in the diagram below

Question

ent A circuit is from two batteries and two wires, as shown in the diagram below. Battery 1 Battery 2 Each battery has an emf of 1.6 volts. Each wire is 26 cm long, and has a diameter of 7 x 104 meters. The wires are made of a metal which has 7 x 1028 mobile electrons cubic meter; the electron mobility is 5 x 105 (m/s)/(V/m). A steady current runs through the circult. The locations marked by "x and labeled by a letter are in the interior of the wire. Which of these statements about the electric field in the interior of the wires, at the locations marked by "x"s, O The magnitude of the electric field at location D is larger than the magnitude of the electric field at location C. At every marked location the magnitude of the electric field is the same. O At location D the electric field points to the right. Which of the following equations is a correct energy conservation (round-trip potential difference) equation for this circuit, along a round trip path starting at the negative end of battery # 1 and traveling counterclockwise through the circuit that is, traveling to the left through the batte y, a dant ung on aound the on t me-me direction)? +1.6V-E (0.26 m) +1.6 v-E (0.26 m) o

Explanation / Answer

1.

2.

Applying Kirchoff;s Loop rule

1.6-E(0.26)+1.6 -E(0.26) =0

c)

0.52EB=3.2

EB=6.15 V/m

d)

n=(7*1028)(pi*(7*10-4/2)2)(5*10-5)*6.15

n=8.29*1018 electrons/s

e)

Electric field does not depend cross-sectional area ,Electric field at location B remains constant

EB=6.15 V/m

f)

Answer is "C'

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