nets that consist of many turns of superconducting wire. A typical such magnet has an inductance of 40 HH. When the magnet is initially powered up, the current through it must be increased slowly so as not to "quench" the wires out of their superconducting state. One such magnet is specified to have its current increased from 0 AA to 150 AA over 230 minmi

The generator of a car idling at 1500 rpm produces 17.3 V .     Part A What will the output be at a rotation speed of 2800 rpm , assuming nothing else changes?   Express your answer to three significant figures and include the appropriate units.

Two long, parallel wires are separated by a distance of 3.40 cm. The force per unit length that each wire exerts on the other is 4.60x10-5 N/m, and the wires repel each other. The current in one wire is 0.640 A. Part A What is the current in the second wire? Express your answer in amperes. I = for Part A for Part A undo for Part A redo for Part A reset for Part A keyboard shortcuts for Part A help for Part A Submit Part B Request Answer Are the two currents in the same direction or in opposite directions? In the same direction In opposite direction Submit Previous Answers ✓ Correct A

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Q The following figures give the O.c.C. of d.c. Shunt generator driven at a constant speed of 700 r.p.m. 40 Terminal voltage (V): 120 10 20 80 160 200 240 260 Field Current (A) : 0.1 0.24 0.5 1.92 1.2 Determine the critical resistance at (a) 700 r.p.m. (b) 850 r.p.m. If resistance of field coils is 50 2, find the range of the field rheostat required to vary the voltage between the limits of 180 V and 250 V on open circuit at a speed of 700 r.p.m. 0.77 3.43 5.2

Part A The switch in (Figure 1) has been in position 1 for a long time. It is changed to position 2 at t 0s. Suppose that AV = 9V. What is the charge Q on the capacitor immediately after the switch is closed? Express your answer with the appropriate units. Figure Q- Value Units Submit Request Answer Part B 25 0 4 pF AV What is the current I through the resistor immediately after the switch is closed? Express your answer with the appropriate units. HA What is the charge Q on the capacitor at t = 50 µs? Express your answer with the appropriate units. HA Q = Value Units Submit Request Answer Part D What is the current I through the resistor at t= 50 us? Express your answer with the appropriate units. HA I = Value Units

a https://session.masteringphysics.com/myct/itemVie PHYSIC 221: E & M, Prof. David Martinez (COC), Spring 2019 CHW #7 Ch. 31, DC Circuits Problem 31.42 de Feedback Show a 励 回 pdf ,ヘ Syllabus-,SPR-2019 cheatsheet (1).pdf

- Part A How much energy is stored in a 2.60-cm-diameter, 14.0-cm-long solenoid that has 190 turns of wire and carries a current of 0.790 A? Express your answer with the appropriate units. UL = 2.82 Submit μA J Previous Answers Request Answer ? X Incorrect; Try Again; One attempt remaining

Mr X and Mr Y are two friends. One day they were walking on the street and saw that a man in a strange dress had shown many magical activities. He introduced a crystal that turned on the LED light by giving pressure on it. Everyone was surprised by that activities. But Mr Y said that this crystal is a piezoelectric transducer and is also known as a self-transducer. However, it can't generate high voltage. Could you explain what the main reasons for generating the low output voltage are?

An inductor with inductance L = 0.400 H and negligible resistance is connected to a battery, a switch S, and two resistors, R1 = 11.0n and R2 = 15.0 2 (Eigure 1). The battery has emf 96.0 V and negligible intemal resistance. S is closed at t = 0. Part A What is the current i just after S is closed? Express your answer with the appropriate units. ? HA i = 0 Figure R2 R L ww