Part A A metallic wire has a diameter of 4.12 mm. When the current in the wire is 8.00 A, the drift velocity is 5.40 × 10 5 m/s. What is the density of free electrons in the metal? Express your answer numerically in m 3 to two significant figures. • View Available Hint(s) 3 m Submit

Part A A 3.4-mm-diameter wire carries a 18 A current when the electric field is 6.5×10-2 V/m What is the wire's resistivity? You may want to review (Pages 753 - 754). Express your answer in ohm-meters to two significant figures. να ΑΣφη ? N. m Submit Request Answer

A material is formed into a long rod with a square cross-section 0.50 cm on each side. When a 112 VV voltage is applied across a 20-mm length of the rod, a 4.0 AA current is carried.     Part A What is the resistivity of the material? Express your answer using two significant figures.

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Two 9.0-cm-diameter metal plates 1.2 cm apart are charged to +12.5 nC. They are suddenly connected together by a 0.218-mm-diameter copper wire stretched taut from the center of one plate to the center of the other. Part A What is the maximum current in the wire? Express your answer with the appropriate units. ► View Available Hint(s) Imax = 2.67 10³ A ?

Part A The starter motor of a car engine draws a current of 120 A from the battery. The wire to the motor is 5.00 mm in diameter and 1.2 m long. The starter motor runs for 0.770 s until the car engine starts. copper How much charge passes through the starter motor? Express your answer with the appropriate units. 円A <. 190 C. Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Part B How far does an electron travel along the wire while the starter motor is on Express your answer with the appropriate units. HA 0.694 mm Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Tarch

In an integrated circuit, the current density in a 2.3-um-thick x 75-um-wide gold film is 7.0x105 A/m² Part A How much charge flows through the film in 15 min? Express your answer to two significant figures and include the appropriate units. Q = μA Value Submit Request Answer Units ?

Part A A 1.3x10-3 V/m electric field creates a 4.9x1017 electrons/s current in a 1.5-mm-diameter aluminum wire. What is the drift speed? Express your answer using two significant figures. va = 1.12 • 10-6 m/s Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What is the mean time between collisions for electrons in this wire? Express your answer using two significant figures. nνα ΑΣφ ? T = S Submit Request Answer Drovide Cood bools