Consider a tightly wound \(100\) turn coil of radius \(10\) cm, carrying a current of \(1\) A. What is the magnitude of the magnetic field at the centre of the coil?
1. | \(8.2\times10^{-4}\) T | 2. | \(4.6\times10^{-4}\) T |
3. | \(5.2\times10^{-4}\) T | 4. | \(6.2\times10^{-4}\) T |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe figure shows a long straight wire of a circular cross-section (radius a) carrying steady current I. The current I is uniformly distributed across this cross-section. If the magnetic field in the region (r < a) is and for (r > a) is , then is:
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of 5 A. What is the magnitude of the magnetic field inside the solenoid?
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA \(100\) turn closely wound circular coil of radius \(10~\text{cm}\) carries a current of \(3.2~\text{A}\). The magnetic field at the centre of the coil is:
1. \(4\times10^{-3}~\text{T}\)
2. \(6\times10^{-3}~\text{T}\)
3. \(2\times10^{-3}~\text{T}\)
4. \(5\times10^{-3}~\text{T}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA solenoid has a core of material with relative permeability \(400.\) The windings of the solenoid are insulated from the core and carry a current of \(2~\text{A}\). If the number of turns is \(1000\) per metre, the magnetizing current \(I_m\) is:
1. \(746~\text{A}\)
2. \(700~\text{A}\)
3. \(729~\text{A}\)
4. \(794~\text{A}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology