1.

Power stations are centers that generate and distribute large quantities of electricity. Power transmission is the process of sending electricity to distant places through wires from the power stations.a. What is the voltage at which electricity is generated at the power station? b. What is the voltage of electricity supplied for domestic consumption? c. In which stage of power transmission is the step-up transformer used? d. Which are the stages in which step down transformers are used in power transmission? e. What are the problems arises during distant energy transmission?f. What are the factors which depend when electricity passes through the conductor?g. What are the methods to reduce the resistance? h. What change will occur in power when intensity of current is reduced in the circuit? i. How is it possible to reduce the intensity of current without power loss?j. What will be the change in secondary current when secondary voltage of a step-up transformer is increased 10 times?

Answer»

a. 11 kV or 11000 V.

b. 230 V.

c. Phase I

d. Phase ii, iii, iv.

e. Voltage drop, Power loss.

f. Current, Resistance, Time.

g. Increase the thickness of the conductor.

h. Power decreases

i. Increase the voltage.

j. Become less by 1/10.



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