1. compare the capative reactance to inductive reactance. Dicussion should inclu
ID: 2989490 • Letter: 1
Question
1. compare the capative reactance to inductive reactance. Dicussion should included frequency response.
2. Describe the operation of series RC circuit. The dicussion must address the phase angle relationship of current and voltage. The answer must inlcude the eefect of source frequency on volage drops across the resistor and capacitor at very low and very high frequency value.
3. Describe the characteristic of the series RC filter circuit with the output across the capacitor component . Distinguish the pass and the stop bandswith reference to the cutoff frequency . Also, state happen to the circuit impendance at the cutoff frequency.
4. what is the phase angle of inductive susceptance?
5. For given tank circuit resonance frequency. What is the parameter that determines he bandwidth?
6. A loww pass filter have a cutoff frequency of 8kHz and the high pass cuttoff frequency of 5kHz. These are two circuit connected back to back in the cascade to form input-output system. How does this combination work. band pass or band stop?
7. name a electronic product that you used everyday that contain a voltage transformer.
8. What is the function of the step down transformer?
Explanation / Answer
1)Resistance is the opposition to the flow of current (AC or DC) which is proportional to a conductor's cross-sectional area and resistivity, and inversely proportional to its length. Reactance is the opposition to AC current due to either the circuit's inductance or its capacitance, and are termedinductive reactance and capacitive reactance. Resistance and reactance are both measured in ohms.
Inductive reactance is proportional to the circuit's inductance and the frequency of the supply;capacitive reactance is inversely proportional to the circuit's capacitance and the frequency of its supply. In other words, inductive reactance increases with frequency, whereas capacitive reactance decreases with frequency.
All AC circuits contain resistance, and most contain some degree of inductance and/or capacitance. So the opposition offered by a circuit to AC current includes resistance together with some combination of inductive and/or capacitive reactance.
It's incorrect to suggest that reactance is 'imaginary' in the every day sense of the word -it exists, so it must be 'real'. In this context, 'imaginary' is a mathematical term that indicates that if resistance and reactance were represented in a vector diagram (called an 'impedence diagram'), then reactance quantity would lie at right-angles to the resistance quantity. For this reason, the overall opposition to current flow, which is called impedance, is not the algebraic sum of resistance and reactance, but thevector sum of the two. So, for example, if a circuit had a resistance of, say, 4 ohms, and its inductive reactance was 3 ohms, then its impedance would be 5 ohms -not 7 ohms.
Although we can represent resistance and reactance using a vector diagram (impedance diagram), strictly-speaking the quantities themselves are not vector quantities. The impedance diagram is created as a result of a phasor (vector) diagram representing the current and voltage relationships in the AC circuit.
2)
A resistor
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