CBSE Class 12 Physics Question Paper 2007 (1)

CBSE Class 12 Physics Question Paper 2007 (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. Is the force acting between two point electric charges q1 and q2 kept at some distance apart in air, attractive or repulsive when (i) q1q2 > 0 (ii) q1q2 > 0 ?

2. Show graphically how the stopping potential for a given photosensitive surface varies with the frequency of incident radiations.

3. A TV tower has a height of 71 m. What is the maximum distance upto which TV transmission can be received ? Given that the radius of the earth = 6.4 × 106 m.

4. Which one of the two diodes D1 and D2 in the given figures is (i) forward biased,(ii) reverse biased ?

5.Suggest a possible communication channel for the transmission of a message signal which has a bandwidth of 5 MHz.

6. In a copper voltameter, the mass of the ions deposited in 30 seconds is m grams. The current (i) vs. time (t) graph for the experiment is as shown in the given figure.

 Calculate the value of E.C.E. of copper in terms of the mass, m, deposited.

Please click the link below to download pdf file of CBSE Class 12 Physics Question Paper 2007 (1).