Learning Goal: To learn to apply the concept of current density and Kirchhoff's junction rule. Consider a junction of five wires, as shown in the figure. The arrows indicate the direction of current flow. (Eigure 1) The information about the magnitudes of the current density and the diameters for wires 1, 2, 3, and 4 is given in the table. Some of the values are unknown. Wire Current density (A/mm²) Diameter (mm) Total Current (A) 1 2 3 4 Part A 1.6 ??? 3.0 0.8 Is Find the current Is in wire 5. Express your answer in amperes. Use two significant figures. Assume that the current out of the junction is positive and that the current into the junction is negative. ▸ View Available Hint(s) 195] ΑΣΦΑ → C Submit 2.0 3.0 1.1 ??? ? ??? 2.0 ??? 4.0 A

Q: What is the equivalent resistance of a 100 kΩ resistor and a 140 kΩ resistor in parallel?  I first…

A: The figure for the setup is shown below.

Q: 1. In this lab you will be calculating the resistivity, you will first need to determine the cross…

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A: GivenL= 2.50 mDiameter (D) = 2.5 mm =2.5 × 10-3 mResistivity of copper (ρ) = 1.68 × 10-8 Ω mV =3.0 V

Q: Determine the voltages and voltage changes indicated based on the circuit diagram below.  Hint,…

A: Apply KVL , we get 0+4I -47+3I+2I+20 = 0  I = 3mA   now  Ved= Ve-Vd=4x3 =12V  as Ve=0V so, Vd= 0-12V…

Q: State a rule for how the current into the junction should compare to the current out of a junction.

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A: Given  Battery supply, E = 3 V  Resistance, R1= 2 ohm  Resistance, R2 = 4 ohm

Q: V potential difference is maintained across a 1 m length of tungsten wire that has a cross-sectional…

A: Current = V/R

Q: 20. Which one of the following is the correct statement regarding the resistance? a. The resistance…

A: statement(a) is incorrect as with increase in temperature the thermal velocity of electrons…

Q: Solve the following Physics problem. Show your solutions. Round off your final answer in a whole…

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.