Number 2 only What HaveI Learned So Far?1. Suppose you have an induced EMF of 10 V existing in a coil. If the current in the coilchanges at a rate of 40 A/s, what is the coil's self-inductance?2. What is the self-inductance of a coil with 450 turns if a steady current of 4.0 A generatesa flux of 2.1 × 10-3 Wb in it?3. A solenoid with a 30-cm iron core has a cross-sectional area of 2.0 cm2. The wire iswound around the core 10 times per cm of its length. Solve for the self-inductance ofthe solenoid if the relative permeability of iron is 500.Reflect UponWhat aspect(s) of Faraday's law did you find difficult to understand? How did youmanage to overcome this difficulty?

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Answered: 2. What is the self-inductance of a…

2. What is the self-inductance of a coil with 450 turns if a steady current of 4.0 A generates a flux of 2.1 × 10-3 Wb in it?

College Physics

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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

Number 2 only

What HaveI Learned So Far?
1. Suppose you have an induced EMF of 10 V existing in a coil. If the current in the coil
changes at a rate of 40 A/s, what is the coil's self-inductance?
2. What is the self-inductance of a coil with 450 turns if a steady current of 4.0 A generates
a flux of 2.1 × 10-3 Wb in it?
3. A solenoid with a 30-cm iron core has a cross-sectional area of 2.0 cm2. The wire is
wound around the core 10 times per cm of its length. Solve for the self-inductance of
the solenoid if the relative permeability of iron is 500.
Reflect Upon
What aspect(s) of Faraday's law did you find difficult to understand? How did you
manage to overcome this difficulty?

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