IG Phy -Electromagnetic Induction(V)
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Question 1 of 10
1. Question
1 point(s)Most power stations burn fuel to produce high-pressure steam that drives a turbine to generate electrical power.
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Question 2 of 10
2. Question
1 point(s)Higher current in transmission cables results in less energy wasted as thermal energy.
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Question 3 of 10
3. Question
1 point(s)Transformers are useful because they help reduce power loss in transmission cables.
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Question 4 of 10
4. Question
1 point(s)Power stations generate electricity at 400 kV before it is transmitted.
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Question 5 of 10
5. Question
1 point(s)Low-voltage transmission cables have higher energy wastage compared to high-voltage cables.
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Question 6 of 10
6. Question
1 point(s)Superconducting cables with zero resistance can be kept at room temperature.
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Question 7 of 10
7. Question
1 point(s)The power lost in transmission cables can be calculated using the formula P=I2×R.
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Question 8 of 10
8. Question
1 point(s)At 25,000 V, the power loss in a cable with 4.0 Ω resistance carrying 160 A is 102,000 W.
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Question 9 of 10
9. Question
1 point(s)Electricity supply companies expect to lose 2.6% of the power generated by the power station during transmission.
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Question 10 of 10
10. Question
1 point(s)At 230 V, a cable with 4.0 Ω resistance carrying 17,400 A will have minimal power loss.
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