In the accompanying figure, the rails, connecting end pieces, and rod all have a resistance per unit length of 102/cm. The rod moves to the left at v= 3.5 m/s. If B = 0.4 T everywhere in the region, what is the current in the circuit (a) when a = 9.5 cm? (b) when a = 4.5 cm? B Hint ● Question Help: Message instructor Submit Question ● ● a a. When a = 9.5 cm, a Select an answer current of circuit. b. When a = 4.5 cm, ● mA flows in the circuit. 4.0 cm mA flows in the
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- A 90 M2 resistor has a current of 0.68 A and is connected in series with a 110 resistor. Part A What is the emf of the battery to which the resistors are connected? Express your answer using two significant figures. IVE ΑΣΦ ε = ? kVA power plant needs to generate Po= 340MW of power for a city 10km away. The city power outlets need to operate at 120V. Part A One idea might be to run the power lines at 120V so homes can directly tap into the power lines. What is the current needed to do this? (Hint: use P-IV). |VD ΑΣΦ ? |= Amps Submit Request Answer Part B The power lines have a resistance of 0.2 0/km. What are the ohm-ic losses (L.e. the power dissipated via resistance) in the power lines to transport the energy from the power plant to the city if we use the current from 1²R part (a)? (HINT: compute the total resistance of the power lines and then use P VG ΑΣΦ 5 A W P=The current i = 36 mA is passing through a system of five resistors connected as shown in the circuit below. Find the magnitude of the current in each resistor if R, = 5 0, R2 = 7 0, R3 = 2 0, R4 = 8 0, and Rg = 6 0. Use Kirchhoff's rules to solve for the currents. R, R3 R5 R2 R4 The current through R1, i, = 22.88 Units mA The current through R2, i2 = 13.14 Units mA The current through R3, iz = 9.72 X Units mA The current through R4, i4 = 9.428 Units mA The current through Rg, ig = 3.714 Units mA The direction of the current through Rg is UP ww
- PLEASE HELP ME ANSWER MY PHYSICS SUBJECTTwo 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 ?A circuit consists of a battery connected to three resistors (70 N, 30 N, and 170 2 ) in parallel. The total current through the resistors is 2.9 A Part A Find the emf of the battery. Express your answer using two significant figures. Πν ΑΣφ E = V Submit Request Answer Part B Find the current through 70 N resistor. Express your answer using two significant figures. ? I = AA 1.90 cm x 1.90 cm square loop of wire with resistance 1.00x10-2 N has one edge parallel to a long straight wire. The near edge of the loop is 1.00 cm from the wire. The current in the wire is increasing at the rate of 130 A/s. Part A What is the current in the loop? Express your answer in microamperes. ΑΣφ ? µA Submit Request Answer