Table R(Q) im(A) 100 0.030 200 0.005 330 0.006 100 0.019 200 0.005 3. Using Kirchhoff's Rules, construct enough mathematically independent equations to solve for the current of each resistor. Then calculate the % error between your measured and theoretical values for the current of each resistor. You MUST use Kirchhoff's Rules: it(A) R1 R2 R3 R4 R5 AV1=5 % Error

A ΔV = 2.3 V battery loses E = 5.5 J of energy each day (t = 24 hrs) powering a cell phone. a) Input an expression for the average current, I, supplied to the phone.

Consider the circuit shown in the figure(Figure 1). Suppose the four resistors in this circuit have the values R₁ = 13, R₂ = 6.4, R3 = 7.6 S2, and R4 = 14 S2, and that the emf of the battery is & = 18 V. Figure C E R₁ ww B ww 1 of 1 ww R₂ RA ww A

A 21.0-m-long cable consists of a solid-inner, cylindrical, nickel core 12.0 cm in diameter surrounded by a solid-outer cylindrical shell of copper 12.0 cm in inside diameter and 24.0 cm in outside diameter. The resistivity of nickel is 7.8 × 10-8. m. Part A What is the resistance of this cable? R = Submit Part B Peff = VE ΑΣΦ Submit Request Answer If we think of this cable as a single material, what is its equivalent resistivity? VE ΑΣΦ = ? Request Answer 5 ? ΜΩ Ω · m

1.3x1016 electrons flow through a cross section of silver wire in 310 us with a drift speed of 7.2x10-4 m/s. ▼ Part A What is the diameter of the wire? Express your answer to two significant figures and include the appropriate units. D = Submit μÅ Value Request Answer Ć Units ?

Three resistors are made out of three different materials and have different (but uniform) cross sections. Resistor 1 has a circular cross section of radius 1.18 mm . Resistor 2 has a square cross section with a side length of 4.77 mm . The third resistor's cross section is a right triangle with two sides of length 1.62 mm . All of the resistors are 0.913 cm in length. Use the provided table of resistivities to calculate the resistance of each resistor. material 1 0.00367 material 2  0.488 material 3 4.63 x 10^-5

Part A A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4232 A is precisely measured at 23.5 °C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3758 A. The temperature What is the unknown temperature? Express your answer using three significant figures. coefficient of resistivity of aluminum is 0.00429 (°C)-1 1 ΑΣφ ? T = °C Submit Request Answer

Wires 1 and 2 are made of the same metal. Wire 2 has twice the length and twice the diameter of wire 1. Part A What is the ratio p2/p1 of the resistivities of the two wires? P1 Submit Part B Π ΑΣΦ R₂ R₁ Request Answer What is the ratio R₂/R₁ of the resistances of the two wires? ? IVE ΑΣΦΑ ?

A gold wire 5.45 m long and of diameter 0.890 mm carries a current of 1.25 A. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Electrical hazards in heart surgery. Part A Find the resistance of this wire. Express your answer in ohms. R = Submit Part B —| ΑΣΦ V = Request Answer Find the potential difference between its ends. Express your answer in volts. | ΑΣΦ ? ? Ω V

Three resistors are made out of three different materials and have different (but uniform) cross sections. Resistor 1 has a circular cross section of radius 1.61 mm. Resistor 2 has a square cross section with a side length of 3.07 mm. The third resistor's cross section is a right triangle with two sides of length 2.59 mm. All of the resistors are 0.613 cm in length. Use the provided table of resistivities to calculate the resistance of each resistor. R₁ = R₂ = R3 = 6.95 Incorrect 443 0.086 Ω Ω Ω Material 1 Material 2 Material 3 2 0.00479 92.m 0.682 92-m 4.63 x 10-5 22-m 3