What is helping you to swallow without deflecting it to the wind pipe?

Write the functions of wind pipe ?

Can you lit a candle without touching the match stick to the wick ?

What is fruit production without fertilization called?

What organs help you before and during eating spicy food ?

Can you give a reason for it (deflection of wire)?

(a) Figure 9.32 shows a cross-section of a 'light pipe' made of a glass fibre of refractive index 1.68. The outer covering of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections inside the pipe take place, as shown in the figure. (b) What is the answer if there is no outer covering of the pipe?

You have a jar with five identical balls of different colour (White, Red, Blue, Grey and Yellow) and you have to pickup (draw) a ball without looking at it. List the possible outcomes you get.

With the help of this diagram , answer the questions. What is the relation you observe in the pictures. What does it denote ?

Consider Experiment 6.2. (a) What would you do to obtain a large deflection of the galvanometer? (b) How would you demonstrate the presence of an induced current in the absence of a galvanometer?