- 1(current)
Q. No.A long solenoid carrying a current produces a magnetic field \(B\) along its axis.
If the current is doubled and the number of turns per cm is halved, what will be the new value of the magnetic field?
1. \(B/2\)
2. \(B\)
3. \(2B\)
4. \(4B\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | \(B \over 2\) | 2. | \(2B\) |
| 3. | \(B \over 4\) | 4. | \(2B \over 3\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo toroids \(1\) and \(2\) have total no. of turns \(200\) and \(100\) respectively with average radii \(40~\text{cm}\) and \(20~\text{cm}\) respectively. If they carry the same current \(i\), what will be the ratio of the magnetic fields along the two loops?
1. \(1:1\)
2. \(4:1\)
3. \(2:1\)
4. \(1:2\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf a long hollow copper pipe carries a direct current along its length, then the magnetic field associated with the current will be:
| 1. | Only inside the pipe | 2. | Only outside the pipe |
| 3. | Both inside and outside the pipe | 4. | Zero everywhere |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. |  |
2. |  |
| 3. |  |
4. |  |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | \(\frac{1}{2}\) | 2. | \(1\) |
| 3. | \(4\) | 4. | \(\frac{1}{4}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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