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1)Why electric shock is feel ?? n in a Electric Train why
we didnt feel that ?
2)What is the reason for transformer Noise ??
3)What is relation b/w Transmission Lines & Communication
Lines ?
4)Which material is used for making Transformer oil & How u
measure its dielectric strength & Name the test ?
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Answer Posted / masoom raza
1)when electrical current passes through our body
then it interacts with electrical impulse in our
body due to which our muscles contracts and expand (depending on type of current i.e ac or dc ,in dc
it contracts while ac in ac it contracts and expands
but very high speed depends on frequency),its called
shock.
in case of electrical train, it is grounded through wheel
so current follows that path(train body to wheel)
rather through our body. so didn't feel shock.
2)transformer noise is due magnetostriction (expansion
and contraction of core in high frequency as in ac
polarity changes rapidly ,i.e it has frequency).
3) transmission line carries high power, have no
insulation ,low frequency operation
communication line carries low power signal,have
insulation
,high frequency operation.
4) transformer oil is usually made from petroleum as it having high Di-electrical strength and high temperature rating and it is less reactive then normal oil.
sorry friend i don't know exactly name of test.
its probably dielectrical strength test.
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