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electric circuit - Universiti Teknologi Malaysia
electric circuit - Universiti Teknologi Malaysia

... After performing this experiment, you will be able to: 1. Use Ohm's law to find the current and voltages in a series circuit. 2. Apply Kirchhoffs voltage law to a series circuit. 3. Apply the voltage divider rule to series circuit. 4. Design a voltage divider to meet a specific voltage output. APPAR ...
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... its resistance to flow is infinite since no water flows through it at all. A meter that measures voltage has a similar characteristic in that the input impedance of voltmeter is very large, typically 10 megaohms or larger. This is considered large enough to not allow current to flow through the mete ...
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... A. How does increasing the battery’s voltage affect the current? ___________________________________________________________________________________________ ___________________________________________________________________________________________ B. How does changing the battery’s voltage affect t ...
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... measured is connected to the output of the buffers as shown in the figure. * During a positive peak of the square wave, the unknown capacitor CX charges up to the supply voltage and at the next zero voltage pulse it discharges ...
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... The function of hermetic sealing is to eliminate the ingress of moisture and oxygen both of which play a role in both short and long term degradation of unsealed resistors. A further enhancement in both short and long term stability is achieved by oil filling. The oil also acts as a thermal conducto ...
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... Robert T. Paynter & B.J.Toby Boydell "Electronics Technology Fundamentals". Make sure that your copy of this examination paper is complete before answering. We start with some circuits found in the student satellite CubeSTAR Exercise 1 CubeSTAR is powered by solar cells. 2 such cells connected in se ...
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... 22. The following three appliances are connected in parallel to a 120 volt house circuit: i) toaster, 1200 W, ii) coffee pot, 750 W, and iii) microwave, 600 W. If all were operated at the same time what total current would they draw? a. 3 A b. 5 A c. 10 A d. 21 A ...
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... Check that the National Student Number (NSN) on your admission slip is the same as the number at the top of this page. You should attempt ALL the questions in this booklet. Make sure that you have Resource Sheet L2–PHYSR. In your answers use clear numerical working, words and / or diagrams as requir ...
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... center of the circuit. (And there’s a reason I called it the “current” and not “total current”) D. Since there is only one path in the circuit this current must the current flowing through each resistor, so put arrows above each resistor and label them with the current you already calculated. ...
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... Leading edge dimming – Triac and thyristor dimmers Leading edge dimming is a type of phase control where the turn on at each half cycle is delayed from the zero crossing point so that the first voltage presented to the load after the zero crossing is the rising or “leading” edge of the voltage. Hist ...
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... Introduction/Purpose: This experiment extends the application of Ohm’s Law to two or more components connected in simple series and parallel circuits. Analysis of our measurements should enable us to derive relationships between total resistance - RT, total current - IT, and the individual voltage d ...
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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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