+ Jumper Cables and Ohm's Law 3 of 20 > Review | Constants Part B Learning Goal: To learn to apply the concept of current density and microscopic Ohm's law. What electric field E' would have been required to create current of 30.0 A in an aluminum wire of the same diameter? Express your answer in V/m. Use three significant figures. A "gauge 8" jumper cable has a diameter d of 0.326 cm. The cable carries a current I of 30.0 A. The electric field E in the cable is 0.062 V/m. • View Available Hint(s) Below is a list of some common metals with their Dνα ΑΣφ ? resistivities. Resistivity e (N. m) Material E' V/m

I need help with part d and e please

A transformer with a turns ratio (secondary/primary) of 1:13 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. Part A What is the voltage supplied to the recharger? Express your answer using two significant figures. -ΨΓ ΑΣΦ V = Submit Request Answer ? V

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

Part B What is the resistance R3? Express your answer with the appropriate units. µA ? R3 Value %3D

Part A A(n) 800-2 and a(n) 2200-2 resistor are connected in series with a 12-V battery. What is the voltage across the 2200-2 resistor? Express your answer to two significant figures and include the appropriate units. HA V2200 Value Units %D

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

Two resistors are connected in series to a battery with an emf of 12 V. The voltage across the first resistor is 2.8 V and the current through the second resistor is 0.17 A. Part A Find the resistance of the first resistor. Express your answer using two significant figures. R₁ Submit Part B [5] ΑΣΦ Request Answer Find the resistance of the second resistor. Express your answer using two significant figures. ? Ω