BSc Sem III 2023 2024 2024 PHYSICS I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 A) Answer the following questions.(ANY 1) (20M)
   • i. an expression for efficiency of otto engine
   • ii. Derive an expression for work done in a carnot's cycle
2. Q1 B) Answer the following questions.(ANY2) (10M)
   • ii. Show that all reversible engines working between the same two temperatures have the State various statements of the sc. ond law of thermodynamics
   • iv. Find the efficiency of Carnot engine working between and It absorb 80 calories of heat. How much heat is rejected
3. Q2 A) Answer the following questions.(ANY 1) (10M)
   • i. Derive an expression for the change in entropy of perfect gas in terms of temperature
   • ii. If 100 grams of water at is mixed with an equal mass of water at the resultant increase in entropy
4. Q2 B) Answer the following questions.(ANY2) (10M)
   • i. What is the change in if 10 gm of water is heated from 313 K to 353K? li. a short note on Entropy and disorder
   • iii. Define Entropy. Explain. Entropy remains constant of a closed system during
   • iv. Write a short note on heat death of universe
5. Q3 A) Answer the following questions.(ANY 1) (10M)
   • i. What is thermocouple? Explain different type of thermocouple in detail with their neat and labelled diagram
   • ii. Explain in detail Semiconductor Diode Temperature Sensor
6. Q3 B) Answer the following questions.(ANY2) (10M)
   • i. neat and labelled diagram explain construction of resistance thermometer
   • ii. between thermistor and thermocouple lil. Write short note on Ultrasonic temperature transducer
   • iv. Write short note on Platinum thin film sensor
7. Q4 Answer the following questions.(ANY3) (15M)
   • i. gm of water is heated from to Calculate the change in entropy
   • ii. An ideal heat engine operates according to Carnot’s cycle and receives 600 cal from heat source every cycle. The temperature of the heat source is 400 K and that of the sink 300K. Find the work done by the Carnot cycle and amount of heat rejected to the sink for the cycle ili. Give advantages and disadvantages of RTD
   • iv. What is pyrometer? Describe, in brief, a disappearing filament type of optical
   • v. Comparison of Otto engine and diesel engine
   • vi. What is Reversible and Irreversible Processes?

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