Boyle’s law

Boyle’s law Open the browser and type “physics-chemistry-interactive-flash-animation.com/ / MCQ.htm” in the address bar. Click enter to start the experiment. Change the volume by adjusting the piston of the syringe ( between ml to ml) and observe how the pressure changes. Tabulate observed values. You will observe when volume decreases pressure inside the syringe gets increased and vice versa. Thus boyle’s law ( PV = constant) verified. Cells alive / .htm Steps In this activity you will be able to verify pressure is proportional to reciprocal of volume (Boyle’s law). th Standard Science INTRODUCTION You have already learnt about electricity in your lower classes, haven’t you? Well, electricity deals with the flow of electric charges through a conductor. As a common term it refers to a form of energy. The usage of electric current in our day to day life is very important and indispensable. You are already aware of the fact that it is used in houses, educational institutions, hospitals, industries, etc. Therefore, its generation and transmission becomes a very crucial aspect of our life. In this lesson you will learn various terms used in understanding the concept of electricity. Eventually, you will realise the importance of the applications of electricity in day to day situations. . ELECTRIC CURRENT The motion of electric charges (electrons) through a conductor (e.g., copper wire) will constitute an electric current. This is similar to the flow of water through a channel or flow of air from a region of high pressure to a region of low pressure. In a similar manner, the electric current passes from the positive terminal (higher electric potential) of a battery to the negative terminal (lower electric potential) through a wire as shown in the Figure . . . . Definition of electric current Electric current is often termed as ‘current’ and it is represented by the symbol ‘I’. It is defined as the rate of flow of charges in a conductor . This means that the electric current represents the amount of charges flowing in any cross section of a conductor (say a metal wire) in unit time. If a net charge ‘Q’ passes through any cross section of a conductor in Figure . Electron flow