PHYS 24100 Study Guide - Final Guide: Temperature Coefficient, Rlc Circuit, Electric Field

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18 Jan 2014

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A circuit break is rated for a current of 20 a rms at a voltage of 240 v rms. Assume switch has been closed a long time so there is a steady current in the inductor. An inductor has a reactance of 135 ohm at. *at resonance, the impedance of a series rlc circuit equals the resistance r. The primary of a step- down transformer has 245 turns and is connected to a. The secondary is to supply 27 a at 9 v. a)find the current in the primary. B)find the number of turns in the secondary, assuming. The energy carried by 300 photons is 2. 5e-16j. Light of wavelength 562 nm is used to illuminate normally two glass plates. 23. 8 cm in length that touch at one end and are separated at the other by a wire of radius . 027 mm. The first excited state of an atom of a gas is.

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The circuit shown has the following component values: E = 11 V,R1 = 68 kÎ©, R2 = 1.5 kÎ©, and L = 15 mH.

a. Determine the time constant (Ï) of the circuit after the switchcloses. ms
b. After the switch closes, determine the steady-state currentthrough the inductor. mA
c. Assume the switch has been closed for a long period of time,determine the energy stored in the inductor. Î¼J
d. Assume the switch has been closed for a long period of time.Determine the amount of voltage that appears across the inductor atthe instant the switch opens (pay careful attention to thepolarity). v

A DC voltage source provides a voltage V = 12.0V and is connected to a resistor of resistance R = 150 ohms and an ideal inductor with inductance L, forming the circuit. For a long time, the switch has been in the position shown, so that a constant current has been built up in the circuit by the voltage source. At t=0 the switch is thrown open to remove the voltage source from the circuit. At time t after t=0, the current through the inductor and the voltage across the inductor is given by, respectively, I(t) and V(t).
If the inductor has inductance 60.0 mH, what is the time constant For this circuit?

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PHYS 24100 Study Guide - Final Guide: Temperature Coefficient, Rlc Circuit, Electric Field

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