What is the functionn of a cell and a wire in an electric circuit?

Asked by Anuhya Bhagavatula | 25th Aug, 2010, 04:26: PM

Expert Answer:

Dear Student,
Please read the table given below, hope it solves all your doubts.

Wires and connections

 Component   Circuit Symbol  Function of Component
Wire To pass current very easily from one part of a circuit to another.
Wires joined A 'blob' should be drawn where wires are connected (joined), but it is sometimes omitted. Wires connected at 'crossroads' should be staggered slightly to form two T-junctions, as shown on the right.
Wires not joined In complex diagrams it is often necessary to draw wires crossing even though they are not connected. I prefer the 'bridge' symbol shown on the right because the simple crossing on the left may be misread as a join where you have forgotten to add a 'blob'!

Power Supplies

 Component   Circuit Symbol  Function of Component
Cell Supplies electrical energy.
The larger terminal (on the left) is positive (+).
A single cell is often called a battery, but strictly a battery is two or more cells joined together.
Battery Supplies electrical energy. A battery is more than one cell.
The larger terminal (on the left) is positive (+).
DC supply Supplies electrical energy.
DC = Direct Current, always flowing in one direction.
AC supply Supplies electrical energy.
AC = Alternating Current, continually changing direction.
Fuse A safety device which will 'blow' (melt) if the current flowing through it exceeds a specified value.
Transformer Two coils of wire linked by an iron core. Transformers are used to step up (increase) and step down (decrease) AC voltages. Energy is transferred between the coils by the magnetic field in the core. There is no electrical connection between the coils.
A connection to earth. For many electronic circuits this is the 0V (zero volts) of the power supply, but for mains electricity and some radio circuits it really means the earth. It is also known as ground.
Topper Learning

Answered by  | 25th Aug, 2010, 04:56: PM

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