How would you place two identical flat coils in contact so that they had the greatest mutual inductance? The least?

Q: Show that if a coil rotates at an angular velocity ω , the period of its AC output is 2π/ω .

A: The AC graph can be demonstrated as,

Q: Calculate the reactance of a 9.0 mH inductor at: a) 40 Hz Xc = b) 400 Hz Xc = c) 4, 000 Hz Xc =

A: Given Data : The inductance of the inductor is given as L = 9 mH.

Q: (a) What is the angular frequency of the circuit when R 0?

A:

Q: A transformer connected to a 120 V (rms) ac line is to supply 12.0 V (rms) to a portable electronic…

A: A transformer that increases the voltage from primary to secondary is called a step-up transformer.…

Q: An RLC circuit has a resonance frequency of 60 Hz. When this circuit is operated at30 Hz, does the…

A: The impedance of a RLC circuit is given by Z=R2+XL-XC2

Q: Derive an expression for inductance of a solenoid. Calculate the Inductance of solenoid, 8 cm in…

A: A solenoid’s self-inductance can be represented as, Here, N, I, and ϕ represent the number of…

Q: A toroidal solenoid has 500 turns, cross-sectional area 6.25 cm2 , and mean radius 4.00 cm. (a)…

A: Given that, Number of turns (N) = 500 Cross-sectional area (A) = 6.25 cm2 Radius (R) = 4 cm=4×10-2 m…

Q: The wire of a tightly wound solenoid is unwound andused to make another tightly wound solenoid of…

A: The mathematical expression for the inductance is given as  L=μ0N2Al Here, μ0 is the permittivity of…

Q: An induced EMF of 20 mV is measured across a coil of 50 closely wound turns while the current…

A: Induced Emf ε=20 mV Number of Turns N=50 Initial Current Ii=0.0 A Final CurrentIf=5.0 A Time…

Q: The self-inductance of a coil is zero if there is no current passing through the windings. True or…

A: Self inductance of a coil

Q: Can a circuit element have both capacitance and inductance?

A: No, it is not possible that a circuit element has both capacitance and inductance.

Q: Ex. 7: When 100V D.C. is applied across a coil, a current of 1A flows through it. When 100 V A.C. of…

A: We need to compute-Resistance (R)=?Impedance (Z)=?Self Inductance (L)=?The data given as-Applied emf…

Q: The current in an inductive coil changes at 30A /s and the back EMF is 3V Calculate the inductance…

A: Given value--- The current in an inductive coil changes at 30A /s. the back EMF is 3V. We have to…

Q: A resistance of 20.0 N and a coil is connected in series with a 12.0 V battery and a closed switch.…

A: Given : R = 20 Ω ε = 12 V i = 0.355 A t = 2 ms = 0.002 s

Q: Consider an LC circuit withL= 0.2 henry and C= 5*10^-4 farad. At time t= 0, when both i(0) and q(0)…

A: Given L= 0.2 H C= 5× 10^-4 F E= Eocos(200t) At time t =0   I=0 and Q=0

Q: Let say that a flat coil of wire, having 5 turns, has an inductance L. Then the inductance of a…

A: For any coil of wire the inductance is given by the following formula : L = µN2A / l µ refers to the…

Q: (II) An air-filled cylindrical inductor has 2600 turns, and it is2.5 cm in diameter and 28.2 cm…

A: Given data: The number of turns in the cylindrical inductor is n=2600. The diameter of the inductor…

Q: Find the mutual inductance  M 21  of smaller solenoid centered inside the coil ?

A:

Q: Describe what arrangement of two flat square coils (with respect to one another) would result in the…

A: (a) For greatest mutual inductance the flat squares must be placed parallel and current in both…

Q: Two coils of wire are placed next to each other. The current in the first coil increased from 0 to…

A: According to the laws of electromagnetic induction, the induced emf in the coil is given by  where,…

Q: State two disimilarities and two similarities between a dc motor and an ac generator.

A: dc motor and an ac generator have electromagnets and armature etc. and the external circuit of both…

Q: (a) Calculate the self-inductance (in mH) of a 49.0 cm long, 10.0 cm diameter solenoid having 1000…

A: Concept used: The property due to which change in current of a circuit induces EMF in same circuit…

Q: When an inductor of value L = 405 x 10 Henry= is used in a series LRC circuit, the resonant…

A: Concept used: Resonance is the condition in which maximum current flows and impedance is minimum in…

Q: 5.5 A hollow air cored inductor coil consist of 500 turns of copper wire which produces a magnetic…

A:

Q: The current in a circuit containing a coil, a resistor, and a battery has reached a constant value.…

A: (a) In the L-R circuit, as the current increases in the coil, it opposes the change but after a…

Q: ... .. In a transformer the mutual inductance of two coils is 0.3 H where as the self inductance of…

A:

Q: What is the relationship between a sinusoidal current and a sinusoidal voltage in an inductor?

A: in this question we discuss  about sinusoidal current and sinusoidal voltage  .

Q: Assume an inductor with inductance L through which passes a current varying as a function of time as…

A:

Q: In comparing the different methods of measuring the value of the mutual inductance between the two…

A:

Q: Two solenoids are one inside the other. The current in the inside coil decreases at a uniform rate.…

A:

Q: An ideal solenoid has a length of 25 mm. If the windings are compressed so that the length is…

A: Inductance: Inductance of a coil is defined as the emf induced in the coil when the current in a…

Q: Explain why the brightness of an incandescent bulb connected in series with an inductor will…

A:

Q: (a) What is the resonant frequency (in Hz) of a resistor, capacitor, and inductor connected in…

A: Given that,R=140ΩC=4.0μF=4.0×10-6Fand, L=3.0HWe know that,The series resonance frequency of a LCR…

Q: Opening a switch in a highly inductive circuit can be dangerous. To see why, consider a 6 V battery…

A: A battery of voltage (V) =6VInitial current (i1) =0After applying 6V, Current (i2) = 3.3AInductance…

Q: Pesky DC current! Suppose you place a 90 V battery in series with a 0.000077 F capacitor. You keep…

A:

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.