### POLYTECHNIC QUESTION PAPER OF APPLIED PHYSICS-I

**Polytechnic ALL engineering Branche Question paper of applied Physics-I**

**Courses :Common to All Engineering Branches**

**Code : 1003**

**Subject :applied Physics –I**

**Year/Sem : Ist**

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**Note: Attempt five Questions Including Question No.1 Which is Compulsory .**

**(A) write true or false of the Following****Light Year is the unit of distance .****If vectors A` and B` are perpendicular to each other then A‘xB`=0.****Surface tension of a liquid Increases with increase in temperature .****Frequency of ultrasonic waves is more than 20 KHz.****Time of Reverberation increases with increase in the volume of meeting hall.**

**(B) Fill in the Blanks **

**If the Percentage error in measuring the side of a cube is 1% then the percentage in volume will be _____**

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**In rotational motion the equivalent quantity of mass is**

**_____________**

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**A Car and a truck are Moving with same Kinetic energy . The linear momentum of ______ will be more .****At ______ value of temperature in Celsius and Fahrenheit scales is same .****Absorptive power of an ideal black body is __________**

**(A) Find the dimensional formula of the following Physical Quantities .****Pressure****Energy****Impulse****Stress****Gravitational Constant**

**(B) Define Centripetal Force. Derive an expression for Centripetal force in terms of Frequency ?.**

**(A) Define angular Momentum . Describe law of conservation of angular momentum with examples .**

**(B) the rate of revolutions of a motor increases from 10 Cycles /Second to 20 cycles/second in 10 second in 10 second . calculate ___**

**Angular acceleration****Angle covered in 4 seconds /4****Number of rounds completed in 4 seconds**

**(A) Write Stoke law. Derive an expression for co-efficient of viscosity of a liquid using Stoke law.**

**(b)A man weighing 70kg is standing in a soft . what will be his apparent weight when____**

**Lift is moving upwards with 4.9 m/sec acceleration****Lift is moving downwards with 4.9 m/sec acceleration**

**5.(A) Define the Following**

**Isothermal surface****Temperature gradient****Steady state****Thermal Conductivity**

**(B) In steady state the Temperature of the ends of 20 cm long metallic rod are 70 c and 20 c the temperature of the rod at 6 cm distance from hot end .**

**6.(A) Prove that the motion of a simple pendulum is simple harmonic Derive an expression for its time period .**

**(B) In simple Harmonic motion of a particle amplitude is 5 cm. If the acceleration of the particle at 2 cm distance from mean position is 8cm/sec what will be the velocity of the particle at a distance 3 cm from mean position .**

**Write short note in any two of the Following ?**

**Stress-strain curve****Theorems of moment of inertia****Different forms of energy and energy Transformation**

**(B) Uses of Ultrasonic waves .**