11.Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this ? 1. Diffusion 2. Refraction3. Internal reflection

12.What is the function of a microprocessor in a computer ?

13.A person is moving towards a plane mirror with a speed of 1 m/sec. The image with approach the moving person with a relative speed of :

14.In cold regions, where temperature may fall below 0 degree C, farmers fill their fields with water to protect their crops from damage because :

15.In Newtons third law, the action and reaction forces : 1. act on different bodies 2. act on the same body3. are not always equal 4. are always equalChoose the correct answer from the codes given below codes :