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Mindmap: Electric Current and its Effects | Science Class 7

The document Mindmap: Electric Current and its Effects | Science Class 7 is a part of the Class 7 Course Science Class 7.
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FAQs on Mindmap: Electric Current and its Effects - Science Class 7

1. What is electric current and how is it measured?
Ans. Electric current refers to the flow of electric charge in a conductor. It is measured in amperes (A), which represents the rate of flow of charge. An ammeter is used to measure electric current in a circuit.
2. What are the effects of electric current on the human body?
Ans. Electric current can have various effects on the human body, depending on the magnitude and duration of the current. It can cause muscle contractions, burns, nerve damage, and even cardiac arrest. The severity of the effects depends on factors such as the path the current takes through the body and the resistance of the body.
3. How does electric current affect electrical appliances and devices?
Ans. Electric current powers electrical appliances and devices, allowing them to function. However, if the current exceeds the device's capacity, it can cause damage or even lead to the device malfunctioning. It is important to ensure that the current supplied to electrical appliances and devices is within their specified limits.
4. What safety precautions should be taken when working with electric current?
Ans. When working with electric current, it is crucial to follow safety precautions to avoid accidents or injuries. Some important precautions include wearing appropriate protective gear, ensuring that the circuit is switched off before working on it, using insulated tools, and avoiding contact with live wires.
5. How does electric current affect the environment?
Ans. Electric current can have both positive and negative effects on the environment. On one hand, it enables the use of renewable energy sources, such as solar and wind power, which help reduce greenhouse gas emissions. On the other hand, the generation of electric current through non-renewable sources, like coal-fired power plants, contributes to air and water pollution, as well as the depletion of natural resources. Efforts are being made to shift towards cleaner and more sustainable methods of generating electric current.
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