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ELECTRICITY (FULL CHAPTER) | CLASS 10 CBSE Video Lecture

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FAQs on ELECTRICITY (FULL CHAPTER) - CLASS 10 CBSE Video Lecture

1. What is electricity and how is it generated?
Ans. Electricity is the flow of electric charge through a conductor. It is generated through various methods such as: - Thermal power plants: They use fossil fuels like coal, oil, or natural gas to produce steam, which drives a turbine connected to a generator to generate electricity. - Hydroelectric power plants: They harness the energy of flowing or falling water to rotate a turbine and generate electricity. - Nuclear power plants: They use nuclear reactions to produce heat, which is then used to generate electricity. - Solar power: Solar panels convert sunlight into electricity through the photovoltaic effect. - Wind power: Wind turbines convert the kinetic energy of the wind into electrical energy.
2. What are the different units used to measure electricity?
Ans. The different units used to measure electricity are: - Volt (V): It measures the electric potential or voltage. - Ampere (A): It measures the electric current. - Ohm (Ω): It measures the electrical resistance. - Watt (W): It measures the power or rate at which electrical energy is consumed or produced. - Kilowatt-hour (kWh): It measures the amount of electrical energy consumed or produced over a period of time.
3. What are the three types of circuits?
Ans. The three types of circuits are: - Series circuit: In a series circuit, the components are connected one after the other in a single path. The same current flows through all the components. - Parallel circuit: In a parallel circuit, the components are connected in multiple paths. The voltage across each component is the same, but the current splits among the components. - Combination circuit: A combination circuit is a combination of series and parallel circuits. It contains both series and parallel connections of components.
4. What is the role of conductors and insulators in electricity?
Ans. Conductors are materials that allow electric charge to flow through them easily. They have free electrons that can move from atom to atom when an electric potential is applied. Examples of conductors include metals like copper and aluminum. Insulators, on the other hand, are materials that do not allow electric charge to flow through them easily. They have tightly bound electrons that do not move easily. Examples of insulators include rubber, plastic, and wood. Insulators are used to prevent the flow of electric current, while conductors are used to facilitate the flow of electric current.
5. What are the safety precautions to be taken while dealing with electricity?
Ans. When dealing with electricity, it is important to follow certain safety precautions to avoid accidents or electric shocks. Some of these precautions include: - Avoid touching electrical appliances or switches with wet hands. - Do not overload electrical sockets or extension cords. - Keep electrical cords away from heat sources or water. - Use insulated tools when working with live electrical circuits. - Switch off the power supply before repairing or replacing electrical components. - Install residual current devices (RCDs) or ground fault circuit interrupters (GFCIs) to protect against electric shocks. - Regularly check and maintain electrical equipment and wiring to prevent any potential hazards.
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