EASY

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What is the working principle of tester?

Important Questions on Chemical Effects of Electric Current

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

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

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Define the Electric fuse.

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

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

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What characteristics should a fuse wire have?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Why is it not advisable to use a piece of copper wire as fuse wire in an electric circuit?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

How does overload and short-circuit occur in an electric circuit ? Explain. What is the function of fuse during this situation?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

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?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Suggest any two measures to avoid overloading in domestic circuits.

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

At the time of short circuit, the electric current in the circuit:

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Why is fuse wire always placed in a live circuit?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

A point A in a circuit is at a lower potential than point B. In Which direction will the current flow in the circuit?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Give the importance of using fuse in a household electric circuit.

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What is short-circuit? What are the causes of short circuit?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

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?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What is the relationship between potential difference and direction of flow of current in an electric circuit?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Ram and Neeraj are alone at home. Ram is watching TV while Neeraj is playing with his toy. The battery in his toy gets discharged. He decides to charge it and connects the plug to the same socket to which the TV is connected. The table fan in their room is also connected to that socket. Suddenly, after a few seconds, Ram sees a heavy spark near the socket. He immediately puts off the main switch and calls his neighbours for help.

(a) What do you think is the reason for the heavy spark in the socket?

(b) What do you learn from Ram's behaviour?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

You must have noticed that fuse of your house electricity shuts down due to overloading. What is this overloading, and why does it happen?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What are direct current and alternating currents? On which type of current your air conditioner, toaster, torch, computer and television works?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What is meant by the statement that the rating of fuse in a circuit is