CBSE Class 12 Physics Question Paper 2011 (1)

CBSE Class 12 Physics Question Paper 2011 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

1. A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the direction of electric and magnetic field vectors? 

2. A resistance R is connected across a cell of emf ε and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell as V. Write the expression for 'r' in terms of ε, V and R. 

3. The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents. 

4. Show graphically, the variation of the de-Broglie wavelength (λ) with the potential (V) through which an electron is accelerated from rest. 

5. In a transistor, doping level in base is increased slightly. How will it affect (i) collector current and (ii) base current ? 

6. Define the term 'wattless current'. 

7. When monochromatic light travels from one medium to another its wavelength changes but frequency remains the same, Explain. 

8. Two uniformly large parallel thin plates having charge densities +σ and –σ are kept in the X-Z plane at a distance 'd' apart. Sketch an equipotential surface due to electric field between the plates. If a particle of mass m and charge '-q' remains stationary between the plates, what is the magnitude and direction of this field ?

Please click the link below to download pdf file of CBSE Class 12 Physics Question Paper 2011 (1).