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प्रश्न
Fig shows a three pin plug top. Label the three pins. Why is the top pin thicker and longer than the other two? Why are the pins splitted at the ends?
उत्तर
E is for earth pin, N is for neutral pin and L is for live pin.
The earth pin is long so that the earth connection is made first. This ensures the safety of the user because if the appliance is defective, the fuse will blow off. The earth pin is made thicker so that even by mistake it cannot be inserted into the hole for the live or neutral connection of the socket.
The pins are splitted at the ends to provide spring action so that they fit in the socket holes tightly.
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संबंधित प्रश्न
Identify the following wires used in a household circuit: The wire is connected to the top terminal of a three pin socket.
The diagram in Fig. shows a three pin plug. Label the three pins.
- Why is the top pin thicker and longer than the other two?
- Why are the pins splitted at the ends?
What purpose is served by the terminals of a three way pin plug? Draw a diagram and name the pins.
Draw a labelled diagram of a three pin socket.
The following diagram shows a three pin socket marked as 1, 2 and 3.
- Identify and write live (L) neutral (N) and earth (E) against the correct number.
- To which part of the appliance is the terminal 1 connected?
- To which wire joined to 2 or 3, is the fuse connected?
In following Figure shows two bulbs with switches and fuse connected to mains through a three pin socket by means of a three wires cable.
- Label each component - bulb, switch, fuse and socket.
- Name and state the colour of insulation of each wire 1, 2 and 3.
- How are the two bulbs joined: in series or in parallel?
State the purpose served by the terminals of a three pin plug.
Give the role of each of the three terminals of a three way pin plug.
Draw a diagram of a three pin plug top. Mark the pins used for live, neutral and earth connections as L, N and E respectively. To which part of the appliance is the pin marked as E connected. To which line L or N is the fuse connected?
