KEAM 2020 Question Papers: Download Previous Year Question Paper with Answer Key PDFs

KEAM 2020 Questions

• 1.

  When blue light is incident on metal surface, photoelectrons are emitted. When green light is incident, no photoelectrons are emitted. What is the number of photoelectrons emitted when yellow light is incident?
  

  • Zero
    
  • Equal to the number for blue light
    
  • Less than for blue light
    
  • Greater than for blue light
    
  View Solution

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• 2.

  Electric field lines around a positive charge are directed:

  • Outward
    
  • Inward
    
  • Radially inward and outward
    
  • None of the above
    
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• 3.

  Work done on splitting a spherical drop into 8 droplets?

  • \( 7 \times W \)
  • \( 8 \times W \)
  • \( 6 \times W \)
  • \( 4 \times W \)
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• 4.

  If \(T\) and \(n\) are surface tension and coefficient of viscosity, if temperature increases, then:
  

  • Surface tension decreases, viscosity decreases
    
  • Surface tension decreases, viscosity increases
    
  • Surface tension increases, viscosity decreases
    
  • Surface tension increases, viscosity increases
    
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• 5.

  Evaluate the integral: \[ \int \frac{2x^2 + 4x + 3}{x^2 + x + 1} \, dx \]

  • \( \frac{2}{3} x^3 + 2x + C \)
  • \( \frac{1}{3} x^3 + 3x + C \)
  • \( \frac{1}{3} x^3 + x + C \)
  • \( \frac{2}{3} x^3 + 3x + C \)
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