when the cuiIS107.101. At a given instantthe current and self-induced emf in aninductor are directed asindicated in the figure (a) Is the current increasing ordecreasing? (b) The induced emf is 17 V, and the rate ofchange of the current is 25 kA/s; find the inductance.condfricti6.00lelllmagrperpedownLetCalcuthe ri102. A 12 H inductor carries a current of 2.0 A. At whatrate must the current be changed to produce a 60 V emfin the inductor?is ene108.inserte103. An inductor is connected to a 20.0-Hz powersupply that produces a 50.0-V rms voltage. Whatinductance is needed to keep the maximum current in170 Vcurrenthe circuit below 80.0 mA?

Given : induced emf, e = 17 V rate of change in current, didt =25 kA/sdidt =25000 A/s the direction…

101. At a given instant the current and self- emf in induced an elll inductor are directed as indicated in the figure (a) Is the current increasing or decreasing? (b) The induced emf is 17 V, and the rate of change of the current is 25 kA/s; find the inductance.

101. At a given instant the current and self- emf in induced an elll inductor are directed as indicated in the figure (a) Is the current increasing or decreasing? (b) The induced emf is 17 V, and the rate of change of the current is 25 kA/s; find the inductance.

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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Concept explainers

Voltage Across Inductor

An actor is a passive electrical component that consists of a coil bent in the form of wire which uses electromagnetism to produce electric current through the coil. When the electric current flows through a conductor that is the coil, a magnetic flux is developed around the conductor. This flow of current through the coil creates a magnetic field based on Fleming's Right-hand thumb rule. If there is any decrease in the current passing through the inductor, then the magnetic field will also decrease and energy is released through the generation of electric current. There is also a secondary voltage inducing in the same coil due to the magnetic flux, since it opposes any changes in the electric current flowing through the circuit. An inductor is also called choke, coil, or solenoid. A choke is designed to block certain frequencies when the DC current passes. A winding coil is coated with insulation to give extra insulation and protect the circuit. They are usually tightly wrapped around a central core which is cylindrical in nature so that the magnetic flux can be induced. The solenoid is a three-dimension coil that is used to exhibit electromagnetism when the magnetic field is developed due to the current flowing through the coil. The sign convention of the inductor is the same as the power dissipating device. When the current flows into the positive side of the voltage across the inductor, the value is positive and the inductor dissipates power whereas when the inductor releases the power back to the circuit, the current has a negative sign convention. 

Question

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when the c
ui
IS
107.
101. At a given instant
the current and self-
induced emf in an
inductor are directed as
indicated in the figure (a) Is the current increasing or
decreasing? (b) The induced emf is 17 V, and the rate of
change of the current is 25 kA/s; find the inductance.
cond
fricti
6.00
lelll
magr
perpe
down
Let
Calcu
the ri
102. A 12 H inductor carries a current of 2.0 A. At what
rate must the current be changed to produce a 60 V emf
in the inductor?
is ene
108.
inserte
103. An inductor is connected to a 20.0-Hz power
supply that produces a 50.0-V rms voltage. What
inductance is needed to keep the maximum current in
170 V
curren
the circuit below 80.0 mA?

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