30.21(An inductor with an inductance of 2.50 H and a resistance of  8.00Ω is connected to the terminals of a battery with an emf of 6.00 V and negligible internal resistance.) (a) Just after the circuit is completed, at what rate is the battery supplying electrical energy to the circuit? (b) When the current has reached its final steady-state value, how much energy is stored in the inductor? What is the rate at which electrical energy is being dissipated in the resistance of the inductor? What is the rate at which the battery is supplying electrical energy to the circuit?

Q: A 7.50 nF capacitor is charged to 12.0 V, then disconnectedfrom the power supply and connected in…

A: The charge on a capacitor is given by, Q = CV where, C is the capacitance of the capacitor, and V is…

Q: A 9.2-V battery, a 4.93-02 resistor, and a 9.1-H inductor are connected in series. After the current…

A: The voltage of the battery is V = 9.2 V  The resistance  R = 4.93 ohm  The inductor L = 9.1 H  After…

Q: (L11) The current flowing through a 3.64E-3 H inductor increases from 3.50 A to 9.62 A. What is the…

A: Inductance of inductor, L=3.64E-3 HInitial value of current, i0= 3.50 AFinal value of current,…

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Q: A 22-mH inductor, an 7.9- resistor, and a 5.6-V battery are connected in series as in the figure…

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Q: ele R L (a) After the switch is first thrown to a (connecting the battery), what time interval…

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Q: When the 20.0 A current through an inductor is turned off in 1.50 ms, an 800 V emf is induced,…

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Q: A 19.0 mH inductor, an 6.00 Ω resistor, and a 9.00 V battery are connected in series.The switch is…

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Q: A 5.00 Ω resistor, an 27.50 mH inductor, and a 13.80 V emf are connected in series. (a)Calculate…

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Q: A 10-mH inductor and a 25µF capacitor are connected in parallel. The combination is in series with a…

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Q: (a) If an inductor carrying a 1.45 A current stores an energy of 0.250 mJ, what is its inductance?…

A: Given data: Current, I=1.45 A;  I'=3.1 A Energy stored, E=0.250 mJ

Q: A 10.00 μF capacitor C is initially charged to a voltage V of 10.00 (V). It is then connected in…

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Q: A 90 mH inductor carries a current that varies with time according to the equation:

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Q: The current in a 20.0-mH inductor changes with time as i = 4.00t2 - 7.00t, where i is in amperes and…

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Q: (a) If an inductor carrying a 1.95 A current stores an energy of 0.250 mJ, what is its inductance?…

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Q: (a) If an inductor carrying a 1.45 A current stores an energy of 0.250 mJ, what is its inductance?…

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Q: A 12.0 V battery is connected into a series circuit containing a 12.02 resistor and a 2.50 H…

A: Given, Resistance, R=12Ω Inductor, L=2.5H Battery, E=12V Time constant,  τ=LRτ=2.512τ=0.208s a. The…

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.