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Give the properties and applications of Bakelite.
This is most common type of phenol formaldehyde. This is hard, thermosetting, dark coloured material.
Its major properties are:
1. Dielectric constant is 4.1.
2. Dissipation factor is 0.001.
3. Dielectric strength is 400 V/mil.
4. Its Volume resistivity is 1013 ohm-cm.
5. Its Maximum useable temperature is 3000F.
6. Water absorption is 0.13%in 24 hours.
Applications: This is widely used for moulded parts as lamp holders, instrument cases and small panels, as electrical parts and terminal blocks or appliances for example: plug holders and sockets.
PROCEDURE: Activity 1: Invitation of quotations. A format for inviting a quotation is given below. You are required to fill up the form for finding out the prices of the follo
numericals
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Consider the following non-linear ordinary equation with an initial condition, y(t=0)=2. ?? ′ =4?? 0.8?? -0.5?? Compute and plot the solution as a function of time from 0 to
In what important respect does the conductivity of a conductor differ from that of an intrinsic Semiconductor. It is well known that the conductivity of a conductor i
write a notes on priming and foaming
Which one of the following statements is correct? You may wish to examine a molecular model of this compound. 1. Carbon G is an asymmetric center and its configuration is R 2
Atmospheric carbon dioxide is thought to be responsible for global warming. The table below contains data about the amount of Atmospheric CO 2 (in ppm) over the last fifty year
chemistry separate the mixture of sand and naphthalene by sublimation
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