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प्रश्न
State one advantage of using a.c. over d.c.
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उत्तर
The voltage of a.c. can be stepped up by the use of step-up transformer at the power generating station before transmitting it over long distances. It reduces the loss of electrical energy as heat in the transmission line wires. On the other hand, if d.c. is generated at the power generating station, its voltage cannot be increased for transmission, and so due to passage of high current in the transmission line wires, there will be a huge loss of electrical energy as heat in the line wires.
संबंधित प्रश्न
Which sources produce alternating current?
Name the phenomenon which is made use of in an electric generator.
What change should be made in an a.c. generator so that it may become a d.c. generator?
Why are Thermal Power Stations usually located near a river?
A d.c. generator is based on the principle of:
(a) electrochemical induction
(b) electromagnetic induction
(c) magnetic effect of current
(d) heating effect of current
State whether the following statement are true of false:
A miniature circuit breaker (MCB) works on the heating effect of current.
Suggest two ways in an a.c. generator to produce a higher e.m.f.
Draw a neat labeled diagram of an A.C. generator
Explain the construction and working of an electric generator (AC) with the help of a neat diagram.
Draw and label the diagram of an AC generator.
