Explain with a neat block diagram the measurement of temperature using Thermistor (measuring system). 2. With neat diagram explain the construction and working principle of RTD.
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Q: Explain with a neat block diagram the measurement of temperature using Thermistor (measuring system)
A: The measurement of temperature using Thermistor is as follows:
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- 92) For three - phase half-wave Controlleed rectifier Shown in he figure: 1. Derive a fomu la for mean load Voltage. 2. praw the wave form of vo, i,,i, iy and voltage across thyristor 1 (r.) assuming highly inductive load and d = 12092) For three- phase half-wave Controlled rectifier Shown in the figure: I- Derive. a formula for mean load Voltage. 2- Draw the wave forms of vo, Li,i, o and voltage across thyristor1 (r.) assuming highly inductive loud and d = 120 VoB2. Explain the resistance - temperature characteristics of the thermistors with neat diagram and write its advantages
- What condition should be followed to achieve discontinuous current mode operation in fully controlled rectifiers ? a. large L/R value b. large inductance value c. rated inductance value d. small L/R valuea) Explain the operation of the controlled full-wave bridge rectifier shown in figure 3. b) The controlled full-wave bridge rectifier shown in figure 3 has a source 120 V rms at 60 Hz, R = 1092, L=20 mH, and a = 60°. Determine: i. An expression for the load current. ii. The average load current. iii. The power absorbed by the load. iv. Sketch the graph of the output waveform. Vs S₁ S4 Figure $3 $₂ Lo VoHow is Zener diode connected into a circuit? What determines the voltage at which a Zener diode break down? What considerations go into determining the power dissipation rating of a Zener diode? Draw a label the schematic symbol used to represent a Zener diode What determines the maximum Zener current of a Zener diode? What is the difference between the maximum Zener current and the reverse current for a Zener diode? What does a positive Zener voltage temperature coefficient signify? What does a negative Zener voltage temperature coefficient signify? How can a Zener diode be temperature compensated?
- Part A- Why negative peaks are eliminated in Half Wave Rectification and how this can be achieved in Full Wave Rectification without eliminating these peaks? Part B- Is Bridge Full Wave Rectifier only working with Transformers or can we use it with AC source as well? If you are agree with this then provide any advantage of this rectifier circuit without using the transformers OR if you are disagree then provide justification of your answer.For the full wave rectifier circuit shown in Figure 1, calculate: 1) The maximum current through the load. 2) The average current through the load. 3) The average voltage across the load. 4) The rms value of the current. 5) The rectification efficiency. Vms = 280V Vin RL= 12ks2 Vrms = 280V Figure 112. The resistance of an NTC thermistor as measured temperature (a) decreases .... increases (c) does not change ... increases (d) increases ... increases
- Question 2 "The diagram below illustrates a bridge rectifier circuit connected to an ideal transformer with center-tapped windings. Assume that the diodes are ideal. • Plot the instantaneous voltage and current waveforms for the loads R1 (292) and R2 (222), with reference to the center tap of the transformer. • Briefly comment on where this rectifier may be used. Turns ratio=10 240V, 50Hz D1 D4 D3 D2 R=202 R=2023-3 rectification? A d'Arsonval meter movement with a full-scale deflection current rating of 1 mA and an internal resistance of 500 2 is to be used in a half-wave rectifier ac voltmeter. Calculate the ac and dc sensitivity and the value of the multiplier resistor for a 30-V rms range.5. The bridge rectifier shown in Figure 2 uses ideal diodes. The input voltage is 24V. Find: DC output voltage b. Sketch the output waveform a. D2 D3 R1 = 12 k2 %3D DA Figure 2. Circuit for problem 5 and 6 ell ll