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What is SCR and its working?
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Draw the circuit diagram of battery charger using SCR and explain its working.

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How does the anode current affect SCR operation once it's turned on?

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Explain triggering of SCR using opto-coupler. State its advantages.

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Draw construction of SCR using two transistor model. Explain its operation.

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State the necessity of synchroscope and with neat sketch explain its working.

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State the function of strain gauge. Give its types and explain the working of any one type of it.

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Draw a neat sketch of Rotameter and explain its working principle.

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Draw constructional details of C-types Bourdon tube and explain its working.

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Draw a neat labeled diagram of a neon sign tube and explain its working.

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What is the working of pn junction diode and its applications?

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With neat sketch of PMMC instrument explain its working briefly.

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What is pyrometry? Explain the working of optical pyrometer with a neat diagram. State its one application.
Answer : ### Pyrometry **Pyrometry** is the measurement of temperature, particularly in high-temperature environments, where traditional temperature measurement methods like thermocouples or thermometers might not be suitable. It is ... . Let me know if you'd like more details or clarification on any part!...

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Draw the constructional diagram of LVDT. State its working principle. What is residual voltage? Explain with a neat diagram.

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What is the difference between active and passive SCR?

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How does SCR operation differ in half-wave and full-wave rectifier circuits?

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What is meant by SCR ratings like VDRM and VRRM?
Answer : In the context of **Silicon Controlled Rectifiers (SCRs)**, the terms **VDRM** and **VRRM** are related to the voltage ratings that describe the SCR's ability to handle voltage under specific conditions. ... direction of the voltage - **VDRM** for forward voltage, and **VRRM** for reverse voltage....

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Define Holding current and Latching current of SCR.

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Draw a neat labelling V-I characteristics of SCR and explain the region.

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