Which of the following wire circuit would show maximum heating effect-
Answers
Answer:
Objective
This topic gives an overview of;
Electric Current and its Effects
Symbols of Electric Components
Heating Effect of Electric Current
Electric Current and its Effects
You might have tried the game How steady is your hand?’suggested in Chapter 12 of Class VI. If not, you may try it out now.Paheli and Boojho had also set up the game by connecting an electric circuit as suggested in Class VI. They had lots of fun trying it out with their families and friends. They enjoyed it so much that they decided to suggest it to a cousin of theirs who stayed in a different town. So, Paheli made a neat drawing showing how the various electric components were to be connected
Can you draw this circuit conveniently? It made Boojho wonder if there was an easier way to represent these electric components.
Symbols of Electric Components
Some common electric components can be represented by symbols. some electric components and their symbols are shown. You may come across different symbols for these components in different books. However, in this book, we shall be using the symbols shown here.
Look at the symbols carefully. In the symbol for the electric cell, notice that there is a longer line and a shorter but thicker parallel line. Do you recall that an electric cell has a positive terminal and a negative terminal? In the symbol of the electric cell, the longer line represents the positive terminal and the thicker, shorter line represents the negative terminal.
For a switch the ‘ON’ position and the ‘OFF’ position are represented by the symbols as shown. The wires used to connect the various components in a circuit are represented by lines.
Explanation:
When a current flows through a conductor, heat energy generates in the conductor. The heating effects of electric current depend on three factors:
The resistance of the conductor. A higher resistance produces more heat.
The time for which the current flows. The longer the time the amount of heat production is high.
Higher the current the amount of heat generation is also large.
Hence the heating effect produced