3) Figure shows a RL circuit and a conducting rod. RL circuit has ɛ = 40 V, R = 5 2, and the time constant t= 1 s. A conducting rod moves with a constant velocity v perpendicular to a circuit with a current I. At t=1 s, in the circuit, the current I is generated. (a) Find the magnetic field. (b) Find the magnetic flux. (c) Find the induced emf. R

3) Figure shows a RL circuit and a conducting rod. RL circuit has ɛ = 40 V, R = 5 2, and the time constant t= 1 s. A conducting rod moves with a constant velocity v perpendicular to a circuit with a current I. At t=1 s, in the circuit, the current I is generated. (a) Find the magnetic field. (b) Find the magnetic flux. (c) Find the induced emf. R

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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5 A 10-cm by 5-cm rectangular loop with resistance 2.50 is pulled through a region of uniform magnetic field B= 1.7 T) with constant speed v=2.4 cm/s. The front of the loop enters the region of the magnetic field at time t= 0. (a) Find and graph the flux through the loop as a function of time. (b) Find and graph the induced emf and the current in the loop as functions of time. Neglect any self- inductance of the loop and extend your graphs from t=0 tot=16s. 10 cm 5 cm . 20 cm B
3) Figure shows a RL circuit and a conducting rod. RL circuit has ɛ = 35 V, R = 7 2, and the time constant t= 1 s. A conducting rod moves with a constant velocity v perpendicular to a circuit with a current I. At t=1 s, in the circuit, the current I is generated. (a) Find the magnetic field. (b) Find the magnetic flux. (c) Find the induced emf. R r I L ll L
A wire loop moves translationally (no rotation) in a uniform magnetic field. Is there an emf induced in the loop?
In the figure below the switch S is closed, Supppose the emf of the ideal battery is 12.0 V, the inductance of the ideal inductor L = 30.0 mH, and the resistance R2 = 4.34 ohms and the resistance R2 = 2.17 ohms. When i = 0.17 A 1. how much energy is delivered by the battery? 2. how much of this energy is stored in the magnetic field of the inductor? 3. how much of this energy is dissipated by both resistors? 4. what is the rate dibat/dt at t = 0, t = 0.82 s and t after a long time?
An American traveler in New Zealand carries a transformer to convert New Zealand's standard 230 V to 115 V so that she can use some small appliances on her trip. a) What is the ratio of turns in the primary and secondary coils of her transformer? b) What is the ratio of input to output current?
a 0.2m length wire moves at a constant speed of 10m/s in at 30 with a 0.02 T B field what is the magnitude and direction of the induced emf in the wire
Explain the relationship between 1. number of loops and maximum emf 2. change of magnetic flux and maximum emf
6)A flat coil is wrapped with 200 turns of very thin wire on a square frame. A uniform magnetic field is applied perpendicular to the plane of the coil. If the flux changes uniformly from 0.0162 Wb T to 0.00 Wb in 8.0 s, find the emf induced in the coil. A. 2.1 mV B. 4.1 mv C. 0.21 V D. 0.41 V E. 0.82 V
#3. (a) Explain elaborately the factors affecting the magnitude of the induced emf in electricity generation. (b)Explain elaborately how can the motion of a charged particle be used to distinguish between an amagnetic field and an electric field?
The transformer on a utility pole steps the voltage down from 10000 V to 220 V for use in a college science building. During the day, the transformer delivers electric energy at the rate of 10.0 kW. a) Assuming the transformer to be ideal, during that time, what are the primary and secondary currents in the transformer? b) If the transformer is only 90 % efficient (but still delivers electric power at 10.0 kW), how does its input current compare to the ideal case? c) At what rate is heat lost in the nonideal transformer? d) If you wanted to keep the transformer cool and to do this needed to dissipate half of the joule heating of part c) using water cooling lines (the other half is taken care of by air cooling), what should be the rate of flow (in liters per minute) of water in the lines? Assume the input cool water is at 68∘∘F and the maximum allowable output water temperature is 98∘∘F} .
4.) In the circuit shown, the initial voltage across the 10 microFarad capacitor is 12V. The solenoid has an inductance of 0.7 H. There is no resistance. a) Find the charge on the capacitor 1.0 millisecond after the switch S is closed. b) At what time will the current in the solenoid reach its maximum value? c) What is the maximum energy stored in the magnetic field of the solenoid?