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The line that draws the power supply to your house from the street has:
Choose the correct options:
1. (b), (c)
2. (a), (d)
3. (b), (d)
4. (a), (c)
| (a) | zero average current |
| (b) | \(220~\text V\) average voltage |
| (c) | voltage and current out of phase by \(90^\circ\) |
| (d) | voltage and current possibly differing in phase \(\phi\) such that \(|\phi|<\dfrac \pi 2.\) |
Choose the correct options:
1. (b), (c)
2. (a), (d)
3. (b), (d)
4. (a), (c)
Subtopic: Â AC vs DC |
Level 3: 35%-60%
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In a heating arrangement, an alternating current having a peak value of \(28~\text{A}\) is used. To produce the same heat energy, if direct current is used to produce the same amount of heat, then its magnitude will be:
| 1. | about \(14~\text{A}\) | 2. | about \(28~\text{A}\) |
| 3. | about \(20~\text{A}\) | 4. | cannot say |
Subtopic: Â AC vs DC |
 58%
Level 3: 35%-60%
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