CBSE Class 12 Physics Question Paper 2006 (Outside Delhi)

CBSE CLASS XII Questions

• 1.

  Write two advantages of reflecting telescope over refracting telescope.
  

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• 2.

  Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.
  

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• 3.

  A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.
  

  

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• 4.

  The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

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• 5.

  Read the following paragraph and answer the questions that follow.
  In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.
  

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• 6.

  With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.
  

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