CBSE Class 12 Physics Compartment Question Paper 2017 with Answer Key (July 17, Set 1- 55/1)

CBSE CLASS XII Questions

• 1.

  A 1 cm straight segment of a conductor carrying 1 A current in \( x \)-direction lies symmetrically at the origin of Cartesian coordinate system. The magnetic field due to this segment at point (1m, 1m, 0) is:

  • \( 1.0 \times 10^{-9} \, \text{T} \)
    
  • \( -1.0 \times 10^{-9} \, \text{T} \)
    
  • \( \frac{5.0}{\sqrt{2}} \times 10^{-10} \, \text{T} \)
    
  • \( -\frac{5.0}{\sqrt{2}} \times 10^{-10} \, \text{T} \)
    
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• 2.

  A metal sheet is inserted between the plates of a parallel plate capacitor of capacitance C. If the sheet partly occupies the space between the plates, the capacitance:

  • remains C
  • becomes greater than C
  • becomes less than C
  • becomes zero
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• 3.

  A rectangular glass slab ABCD (refractive index 1.5) is surrounded by a transparent liquid (refractive index 1.25) as shown in the figure. A ray of light is incident on face AB at an angle \(i\) such that it is refracted out grazing the face AD. Find the value of angle \(i\).

  

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• 4.

  A charge \( -6 \mu C \) is placed at the center B of a semicircle of radius 5 cm, as shown in the figure. An equal and opposite charge is placed at point D at a distance of 10 cm from B. A charge \( +5 \mu C \) is moved from point ‘C’ to point ‘A’ along the circumference. Calculate the work done on the charge.
  

  

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• 5.

  \[ \int \frac{x + 5}{(x + 6)^2} e^x \, dx \] is equal to:

  • $\log(x + 6) + C$
    
  • $e^x + C$
    
  • $\frac{e^x}{x + 6} + C$
    
  • $-\frac{1}{(x + 6)^2} e^x + C$
    
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• 6.

  Explain the primary objectives of Gandhiji’s ‘Salt Satyagraha’. How did this Satyagraha mobilize public opinion against British rule? Explain.

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