Q.91
ICAR AIEEA PG Dairy Technology 09 July 2023 (Shift 1) Paper
MCQ (Single Correct)
The equation for alternating voltage is given by :
प्रत्यावर्ती वोल्टता (alternating voltage) का समीकरण किसके द्वारा दिया जाता है?

Alternating Current (AC) fundamentals:

  • cosine waveform represents a voltage shifted by $90^\circ$ relative to standard zero-crossing.
  • An alternating sinusoidal voltage generated by a coil rotating in a uniform magnetic field is standardly expressed as $e = E_m \sin(\omega t)$, where $e$ is instantaneous voltage, $E_m$ is maximum peak amplitude, $\omega$ is angular frequency in radians per second ($2\pi f$), and $t$ is time in seconds.
  • Tangent functions are discontinuous and do not represent physical harmonic AC waveforms.
  • Cosecant functions are discontinuous reciprocal functions not representative of continuous electromagnetic induction.
Therefore, option 2 ($e = E_m \sin(\omega t)$) is the correct answer.

प्रत्यावर्ती धारा (AC) के मूलभूत सिद्धांत:

  • कोसाइन तरंग मानक शून्य-क्रॉसिंग से $90^\circ$ फेज विस्थापन दर्शाती है।
  • एकसमान चुंबकीय क्षेत्र में घूर्णन करती हुई कुंडली में प्रेरित तात्कालिक प्रत्यावर्ती वोल्टता का मानक समीकरण $e = E_m \sin(\omega t)$ होता है, जहाँ $E_m$ अधिकतम शिखर मान (peak amplitude) और $\omega$ कोणीय आवृत्ति है।
  • स्पर्शज्या (tan) फलन प्रत्यावर्ती तरंग का निरूपण नहीं करता है।
  • कोसिकेंट (cosec) फलन भी निरंतर ज्यावक्रीय तरंग का निरूपण नहीं करता है।
अतः विकल्प 2 सही उत्तर है।
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Packaging Materials & Systems: Flexible Laminates, Aseptic Packaging, MAP, Vacuum Packaging & Quality Evaluation Thermal Processing of Fluid Milk: LTLT, HTST Pasteurization, UHT, Sterilization & ESL Systems Technology of Frozen Dairy Desserts: Ice Cream Mix Formulation, Freezing, Overrun, Hardening & Novelties Dairy By-Product Utilization & Whey Processing: Casein, Caseinates, Whey Powder, WPC, WPI & Lactose Recovery Sensory Evaluation of Dairy Products: Discrimination Tests, Hedonic Scaling, Scoring Systems & Flavor Defect Profiling Concentrated Milks: Evaporated Milk, Sweetened Condensed Milk, Standardization & Pilot Sterilization Fluid Milk Reception, Chilling, Clarification, Standardization & Homogenization Ghee Technology: Traditional, Cream-Butter, Pre-Stratification & Continuous Methods, Packaging & AGMARK Dried Milks: Roller & Spray Drying, Atomization, Powder Properties, Instantization & Specialty Infant Formulas Cheese Manufacture: Coagulation, Curd Handling, Cheddaring, Pressing, Salting & Curing of Hard & Semi-Hard Cheeses Butter Technology: Batch Churning, Continuous Butter Making (CBM), Working, Salting & Rheology Traditional Heat-Desiccated & Acid-Coagulated Indian Dairy Products: Khoa, Paneer, Chhana & Their Sweets Membrane Filtration in Dairy Processing: Reverse Osmosis (RO), Nanofiltration (NF), Ultrafiltration (UF) & Microfiltration (MF) Soft, Acid-Coagulated & Mold-Ripened Cheeses: Cottage, Mozzarella, Camembert, Roquefort & Fresh Cheeses Technology of Fermented & Probiotic Milks: Dahi, Yoghurt, Cultured Buttermilk, Lassi, Kefir & Koumiss Technology of Fat-Rich Products: Cream Separation, Processing, Neutralization & Cream Varieties Traditional Fermented, Fat-Rich & Frozen Indian Dairy Confections: Shrikhand, Rabri, Kulfi & Ghee Residue
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