Help A V = 86-V source is connected in series with an R = 1.8-kΩ resistor and an L = 28-H inductor and the current is allowed to reach maximum. At time t = 0 a switch is thrown that disconnects the voltage source, but leaves the resistor and the inductor connected in their own circuit. After the current decreases to 53 % of its maximum value, the battery is reconnected into the circuit by reversing the switch. 1) At what value of the time t, in milliseconds, does the current reach 77 % of its maximum?  2)  How much energy, in millijoules, is supplied in total by the battery, both in initially bringing the current to maximum and in bringing the current back to the 77 % level from 53 %? Ignore energy dissipated in the resistor during those processes.

Q: An 9.5 H inductor is connected in series to a 18 V battery, a resistor, and a switch which has been…

A:

Q: Where a 44 V battery is connected to three resistors and an inductor with values R1 = 96 Ω, R2 = 24…

A: An inductor has the tendency to resist the change in current in the circuit. When a switch is…

Q: Magnetic resonance imaging instruments use very large magnets that consist of many turns of…

A: In magnetic induction, emf=LdIdt This emf is equivalent to voltage applied, V=LdIdt Change in…

Q: A 10-V battery is connected in series to a 10-H inductor and a 10-Ω resistor.  How long does it take…

A: The current in a series RL circuit (consisting of a resistor and an inductor) is given by the…

Q: A capacitor with a capacitance 5.00 × 10-5 F is charged by connecting it to a 12.0 V battery. The…

A: Given:Max charge on capacitor, Qo = 6.00×10−4 Cangular frequency, ω = 120 rad/sMax voltage on the…

Q: When the 20.5 A current through an inductor is turned off in 1.55 ms, an 810 V emf is induced,…

A:

Q: Consider a circuit shown below with the following parameters, battery voltage V=13 V, the resistors…

A: When the switch is immediately closed, the inductor will behave as a resistor of infinite resistance…

Q: In the circuit shown in the figure, the inductor has inductance L = 4.00 H and negligible internal…

A:

Q: A 3.7 mH inductor is initially connected to a 4.6 V battery at t = 0 through a 3.0 Ω resistor. Once…

A: Given: Inductance of an inductor (L) = 3.7 mH. Supply voltage (ε) = 4.6 V. Resistance (R) = 3.0 Ω.…

Q: A series circuit contains a 2.50-H inductor, a 4.10-02 resistor, and a 9.50-V battery. The current…

A: Given, inductor L = 2.50 H Resistor R = 4.10 Ohm's Voltage V = 9.50 V t = 0

Q: A constant voltage of 5.00 V has been observed over a certain time interval across a 2.20 H…

A:

Q: A 12.0-V battery is connected to a series circuit containing a 25.0 2 resistor and a 5.00 H…

A: An RL circuit is made by connecting a resistor and an inductor in series or in parallel. The…

Q: Consider an LR circuit that consists of a 29.0 mH inductor, a 9.00 Ω resistor, a 24.0 V battery, and…

A:

Q: A 1.25 H inductor in an RL circuit (with resistance 2.2 Ω) is initially fully charged. A switch is…

A: When the switch is at position 2, the expression for the current will be,

Q: A 20.0-V battery is connected to a series circuit containing a 100.0 2 resistor and a 3.00-H…

A: An RL network or RL filter is a circuit made of an inductor and a resistor. Since the circuit…

Q: In the figure below, a 13.0 V ideal battery, a 23.302 resistor, and an inductor are connected by a…

A:

Q: Consider a 27 mH inductor that has a resistance of 4.25 Ω.  Part (a)  What is the time constant, τ,…

A: Concept We have given a LR circuit, with inductance L = 27mH = 0.027 H , and resistance R = 4.25 Ω…

Q: A resistor and an inductor are connected in series to a battery with emf 240 V and negligible…

A: Given: The emf of the battery is ε=240 V. The initial current in the circuit is I0=5.00 A. The rate…

Q: Consider the RL circuit in the figure with R=10.00 Ω, L1=1.80 H, L2=3.90 H, and V=5.0 V. At time…

A:

Q: A 7.2-mH inductor is connected to a current. What is the magnitude of the voltage in the inductor at…

A: The inductance of the inductor, L =7.2 mH Current through the inductance circuit, I(t) = 5+7t-2t2…

Q: A 1.65 H inductor in an RL circuit (with resistance 1.8 Ω) is initially carrying a current of 4.95…

A: Given that:- Inductance of inductor=L=1.65H

Q: A 12-V battery is connected in series with a resistor and an inductor, with R = 10 Q and L = 20.0 H,…

A: Given, Battery, V = 12 VInductor, L = 20.0 HResistor, R = 10 Ω

Q: The voltage across an inductor is proportional to the inductor and the derivative of the current…

A: As we know that,          Voltage across Inductor is given by :…

Q: A constant voltage of 12.00 V has been observed over a certain time interval across a 2.00 H…

A:

Q: An inductor L = 0.025 H and a 40 Ω resistor are connected in series to a 5 volt battery and a…

A: Given data:    L=0.025 H  R=40 Ω   V=5.0 Volt

Q: A 35.0 V battery with negligible internal resistance, a 50.02 resistor, and a 1.25 mH inductor with…

A: Voltage is Resistance is Inductance is Note:Find:(a) Time in which the current through the inductor…

Q: A 27.0 mH inductor, an 6.00 Ω resistor, and a 6.00 V battery are connected in series. The switch is…

A: Given: Inductance of inductor = 27.0 mH Resistance R=6.0 Ω voltage of battery ε=6.0 V

Q: A 12.0-V battery is connected into a series circuit containing a 20.0-2 resistor and a 1.70-H…

A: Given value--- V = 12 V. R = 20 Ohm. L = 1.70 H. We have to find--- (a) In what time interval…

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.