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Neurons carry messages in the form of signals which are known as nerve impulses.

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Important Questions on Physical Environment-Electricity

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In domestic electric circuit the fuse wire is connected to which of the following?

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Select the most correct alternative given below each statement and write the completed statement:
An electric fuse is used to ________

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Why is it not advisable to use a piece of copper wire as fuse wire in an electric circuit?
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How does overload and short-circuit occur in an electric circuit ? Explain. What is the function of fuse during this situation?
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Electricity and magnetism are linked to each other.

Two fuse wires A and B of the same length but rated 20 A and 10 A respectively which will be more thicker and why?

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Suggest any two measures to avoid overloading in domestic circuits.
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A circuit has a fuse of 5 A. Find the maximum number of 100 W220 V lamps that can be used in the circuit.
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 A point A in a circuit is at a lower potential than point B. In Which direction will the current flow in the circuit? 
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What is the relationship between potential difference and direction of flow of current in an electric circuit?
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You must have noticed that fuse of your house electricity shuts down due to overloading. What is this overloading, and why does it happen?
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If in an electric circuit the positive terminal is marked as P and negative as N, what will be the direction of flow of current in the circuit?