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Calculate how much it would cost to buy the same amount of energy from the Main Electricity Board.(1 Mark) b. A student boils water in an electric kettle for 20 minutes. Using the same mains supply he wants to reduce the boiling time of water. To do so should he increase or decrease the length of the heating element? Justify your answer.(2 Marks)
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Question Text | Calculate how much it would cost to buy the same amount of energy from the Main Electricity Board.(1 Mark)
b. A student boils water in an electric kettle for 20 minutes. Using the same mains supply he wants to reduce the boiling time of water. To do so should he increase or decrease the length of the heating element? Justify your answer.(2 Marks)
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Updated On | Jan 7, 2023 |
Topic | Physics |
Subject | Science |
Class | Class 11 |
Answer Type | Video solution: 2 |
Upvotes | 279 |
Avg. Video Duration | 4 min |