Electric wires have a plastic insulation over them. The Dry Cell: Now, we will learn what produces an electric current. Electric Switch This is done with … Question 3 State few uses of electricity? We should never join the two terminals of a cell directly by a wire because if we join the two terminals of a cell directly by wire only, then the chemicals present in the cell get used up very fast, the cell gets damaged quickly. Different cells use different methods for producing an electric current. The electric cells or batteries used in cars, cameras, mobile phones can be recharged again and again for many years. The term Ohm is defined in the chapter, Electricity. Power to control the distribution and consumption of energy. Electric cell: Electric cell is a source of electricity. The whole thing is then sealed (with only the metal cap sticking out), so that the contents do not spill out. The inside portion of the bulb is filled up with inert gases, like argon. Fill in the blanks: (a) A device that is used to break an electric circuit is called_____ (b) An electric cell has_____ Ans: (a) switch (b) two. MCQ Questions for Class 10 Science: Ch 12 Electricity 02 Jul, 2020 MCQ Questions for Class 10 Science: Ch 12 Electricity. Production of electricity in a cell: An electric cell produces a small amount of electricity from chemicals stored inside it. With help from an adult, look at what is inside a transparent electric bulb (Fig. The electric cell is a cylindrical device having a small metal cap on one side and a metal disc on the other side. Electricity can be very dangerous, if you do not handle electrical devices carefully. The small electric bulb which produces light when a torch is switched on is called a torch bulb. When the switch completes the circuit, it is called closed switch. Which of these run on electricity? If electric wires and electrical appliances are handled carelessly, then a person can get electric shock which may cause severe burns and even death. Conductor. Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others.. … Most of the devices and machines we use like an electric iron, oven, room heater, refrigerator, ceiling fan or an electric bulb work when an electric current flows through them. Question 8 Which part of the torch bulb gives off light when it is connected to a cell by wires? Flow of current in a circuit: As soon as the path from one terminal of electric cell to the other is completed, an electric current starts flowing through the circuit and the bulb lights up. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. Open circuit: If there is any gap in the path of a circuit, the bulb does not light up. Terminal: All types of electric cells have two terminals, a positive terminal and a negative terminal. Instrument to Measure Current• An ammeter is an instrument used for measuring electric current. When we open an electric circuit, the flow of electric current in the circuit stops [Fig. 14.2), and electric current that we get from plug points in houses. Look at the pictures given below. The tip of the metal cap and the base of the zinc can are called the positive and negative terminals of the dry cell, respectively. We use electricity to run many appliances in our day to day life which makes our work easier. She has started this educational website with the mindset of spreading Free Education to everyone. Physics > Electricity > Heating Effects of Electric Current and Its Applications. Nowadays, solar cells are being used in many applications. It generates direct current (DC) due to chemical reaction that takes place inside it. Power station: Electricity that we use at homes, in our factories, is supplied from a power station. 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