The capacitance of a parallel-plate capacitor is proportional to the area of its plates and inversely proportional to the plate separation. O True O False The drift speed of electrons in a copper wire carrying 10 A current is much greater than 1 m/sec. O True O False

m An aluminum wire having a cross-sectional area equal to 2.10 x 107 -6 electron per atom. Find the drift speed of the electrons in the wire. mm/s Need Help? Read It carries a current of 7.00 A. The density of aluminum is 2.70 g/cm³. Assume each aluminum atom supplies one conduction

A 50-A current is running through a cylindrical wire that has a cross-sectional area of 4.0 mm2. The drift velocity of the conduction electrons in the wire is 0.85 mm/s. What is the numebr density of the conduction electrons in the wire?   a. 9.2 x 1028 electrons/m3   b. 1.4 x 1029 electrons/m3   c. 3.2 x 1030 electrons/m3   d. 4.6 x 1028 electrons/m3   e. 5.7 x 1029 electrons/m3

The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.30 A. The radius of cross-section A1 is r1 = 0.510 cm. What is the magnitude (A/m2) of the current density across A1? Since the radius r2 at A2 is larger than the radius r1 at A1. will the current and current density at A2 larger, smaller, or the same? Assume A2 = 5A1.  What is the radius, the current, and the current density at A2?

The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.40 A. The radius of cross-section A₁ is r₁ = 0.360 cm. A₁ (a) What is the magnitude of the current density across A₁? A/m² The radius r₂ at A₂ is larger than the radius ₁ at A₁. (b) Is the current at A₂ larger, smaller, or the same? O The current is larger. O The current is smaller. O The current is the same. Az (c) Is the current density at A₂ larger, smaller, or the same? O The current density is larger. O The current density is smaller. O The current density is the same. Assume A₂ = 3A₁. (d) Specify the radius at A₂. mm (e) Specify the current at A₂. (f) Specify the current density at A₂. A/m²

The mean time between collisions in iron is 4.8x10-15 s. ▼ Part A What electron current is driven through a 1.4-mm-diameter iron wire by a 0.070 V/m electric field? Express your answer as a number of electrons per second. 17 ΑΣΦ ie= = Submit Request Answer ? electron/s

In the figure,E₁ = 6.00 V, E₂= 12.0 V, R₁ = 100 S2, R₂ = 200 S, and R3 = 300 2. What are the (a) size and direction (up or down) of the current through R₁, the (b) size and direction (left or right) of the current through R2, and the (c) size and direction (left or right) of the current through R3? www Ro E₁ M R₁ www R3 E2

hw6 A current of I = 1.4 A is passing through a conductor with cross sectional area A = 4.5 × 10-4 m2. The charge carriers in the conductor, electrons, have a number density n = 9.7 x 1027 m-3. Calculate the numerical value of v, in m/s.

V + R w с The switch in the figure is thrown so that the battery is in series with the resistor and an uncharged capacitor. After 1.9 time constants, what is the charge on the capacitor in terms of the maximum charge, Qo? Supply the missing numerical factor below. Q(1.9T) = ( )Qo

Can you please answer d, e & f?