Electric Cells and Current Electricity
The lesson covers the types of electric cells, including primary and secondary cells. It explains the concepts of electromagnetic force, current electricity, potential difference, and resistance. The arrangement of cells in series and parallel is also discussed.
- 32:27 “All right, we're going to take a question from this. We have the first question, which is two cells. Let's say the first question, the first question. Two cells, each of EMF, four votes, two cells, we have these, two cel...”
- 33:22 “They are made to supply a current of a combination of three resistors. One of the resistance, four ohms, four ohms, connected in series, four ohms, four ohms, connected in series to a parallel combination of two other re...”
- 00:00 “Good students, this is Eme Nnamdi John, I will be taking us on physics, on the topic electric field. Now, electric field, we'll talk about the electric cell. Electric cell is a device used to supply electric energy. We h...”
Properties of Oxygen and Hydrogen
This lesson covers the properties, preparation, and tests of oxygen and hydrogen gases. It explains the role of these gases in the environment and their reactions with other elements. The lesson also includes information on the physical states of oxygen.
- 14:37 “to produce electric city, water and small amount of heat. You can see in the picture the individual fuel cell can be used to generate electric power. The oxygen comes in from this direction. The hydrogen comes in from th...”
- 17:08 “Now, the test for hydrogen. The pop-up test, when it leads tapah, when using a leads tapah, it will produce an audible pop when placed in hydrogen glass, gas. Gases can be produced in the school laboratory when a compoun...”
- 13:47 “Number two, it is used in filling balloons and airship. The airship needs hydrogen to be filled, so that it can float on air. Number three, for adenine of animal oils and certain vegetable oils. Number four, for rocket f...”
Carbon and its Allotropes
The lesson covers the characteristics of carbon as an element and its various forms, known as allotropes. It explains the presence of carbon in nature, its compounds, and the two types of carbon oxides. The importance of carbon in living systems and its economic significance is also discussed.
- 13:54 “by special, special or equivalent bonds, okay? Now this gives some double bond character to the carbon to carbon bond like we see in that structure previously. So this gives it the presence of the localizer, this is a pi...”
- 12:22 “These are the, these are what you are seeing here. These are dotted lines at the water wall forces. So the horizontal distance is 0.14 nanometer. They're the vertical distance between the carbons to carbon is 0.34 nanome...”
- 14:43 “So it has a soft, it is actually a soft black material which feels greasy to touch, okay? So it uses a graphite. So as a lubricant, at high temperature, so we know that graphite is used for lubricating part of machine, s...”
Metals and their compounds
This lesson covers the characteristics of metals, including their ability to lose electrons and form positive ions. It discusses the classification of metals, their physical properties, and examples of common metals such as sodium, magnesium, and aluminum. The lesson also includes information on the
- 15:30 “So to balance the equation, you can put two here now. So for a cathode now, the reaction that cathode, cathode is negative pole by which electrons enter the electrolyte. Remember that light charges repair on light charge...”
- 19:33 “to give you ZNO plus SO2. So you now have carbon that reacts with oxygen to give you this extra two electron. So the extra two electron now, we now react with that matter. M2 plus refers to this ZN. That will now be ZN2...”
- 17:11 “very expensive. So this one is preferred, preferred to that one, except that the very reactive methods, you can't both carry out electrolysis on them. So reduction of others. The less electro-positive methods like zinc,...”