KCET 2026 Physics Answer Key- Download PDF

KCET Questions

• 1.

  A source of frequency \( \nu \) gives 6 beats/second when sounded with a source of frequency 200 Hz. The second Harmonic of frequency \( 2\nu \) of the source gives 8 beats/second when sounded with a source of frequency 420 Hz. The value of \( \nu \) is
  

  • 205 Hz
    
  • 206 Hz
    
  • 195 Hz
    
  • 210 Hz
    
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• 2.

  In thermodynamic processes, which of the following statements is not true?
  

  • In an isothermal process, the temperature remains constant
    
  • In an isobaric process, the volume remains constant
    
  • In an adiabatic process, the system is insulated from the surroundings
    
  • In an adiabatic process, $PV^\gamma$ = a constant
    
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• 3.

  A point charge is placed in a moving train. A passenger A sitting in the train and person B on the ground observe the fields due to this charge. Then
  

  • A observes both electric and magnetic fields
    
  • B observes both electric and magnetic fields
    
  • A observes only magnetic field
    
  • B observes only electric field
    
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• 4.

  A small town with a demand of 900 kW of electric power at 220 V is situated 20 km away from an electric power generating station. The two-wires line has resistance per unit length of \( 5 \times 10^{-4} \ \Omega \text{m}^{-1} \). The town gets power from the line through 45000 V to 220 V stepdown transformer at a substation in the town. The line power loss in the form of heat is
  

  • 4 kW
    
  • 8 kW
    
  • 40 kW
    
  • 80 kW
    
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• 5.

  Instrument fitted in the carburetor of the automobile to provide the correct mixture of air and fuel necessary for combustion works on
  

  • Pascal's Law
    
  • Bernoulli's Principle
    
  • Newton's Law of Cooling
    
  • Archimedes' Principle
    
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• 6.

  In a capillary tube experiment, a vertical 30 cm long capillary tube is dipped in water, water rises upto a height of 10 cm due to capillarity. If this experiment is conducted in a freely falling elevator, then the length of the water column becomes
  

  • 10 cm
    
  • 20 cm
    
  • 30 cm
    
  • Zero
    
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