BASIC ELECTRICAL ENGINEERING

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Name : G. Snehalatha
Designation : Lecturer
Branch : Electrical & Electronics Engineering
Institute : Govt. polytechnic, Mahabubnagar
Year/Semester : I Year
Subject : Basic Electrical Engineering
Subject Code : EE105
Topic : Conducting Materials
Duration : 50 minutes
Sub Topic : Mercury
Teaching Aids : PPT, Animation, Diagrams
Revised by : A.K. Srikanth, L/EEE, Q.Q.GPT, HYD

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• Properties of Platinum
• Applications of Platinum
Recap
In the previous class we have studied about

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• Understand the Properties of Mercury
• Understand the Applications of Mercury
On completion of this period , you would be
able to
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Objectives

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What is the material used for the following Lamps ?
• Mercury ( High resistivity conducting material )
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Mercury
• It is the only metal in liquid state at room
temperature
• Good conductor of heat and electricity
• Poisonous metal
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1. It is silver white in Colour
Properties of Mercury
2. It is heavier in weight
3. Boiling point is 3570C
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4. It dissolves most of the metals.
5. It gets oxidized in the presence of
oxygen if heated beyond 3570c
6. Its expansion and contraction is uniform over
a wide range of temperature changes
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Properties of Mercury
Contd..

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Applications of Mercury
• Used in Mercury vapour lamps
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• Used in Mercury arc rectifiers
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Applications of Mercury
Contd..

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• Mercury is the only metal in liquid state
• It is a good conductor of heat and electricity
• It is used in Mercury vapour lamps, Mercury arc
rectifiers etc
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Summary
In this period we have discussed about

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1. Boiling point of Mercury is
a) 5000 C
b) 4000 C
c) 3570 C
d) None of the above
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Quiz

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a) Mercury arc rectifiers
b) Mercury vapour lamps
c) Both (a) & (b)
d) None of the above
2. Mercury is used in
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Quiz

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1. State the properties of Mercury.
2. State the applications of Mercury.
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Frequently Asked Questions

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In the next class we will discuss about
Next Class topic
• Understand the Properties of Mercury
• Understand the Applications of Mercury

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The will to win, the desire to
succeed, the urge to reach your
full potential... these are the
keys that will unlock the door to
personal excellence.
Eddie Robinson