Question: What is the basic principle of electric pen ? Explain how it can be used for writing. Answer: Electric charge on ions is used for writing with an electric pen. Method : (i) Take a filter...
Question: Solution : Join center of third circle (say X) and B Join center of middle circle (say Y) and mid point of CD (say Q)Then, AYQ and AXB are similar, =>...
Monsoon is the seasonal reversal of wind. India has monsoon type of climate. It has following characteristics: (i) Monsoon which comes as South-West monsoon in Indian sub-continent proceeds into two...