TS EAMCET · Physics · Magnetic Effects of Current
A closely wound solenoid of \(80 \mathrm{~cm}\) long has 5 layers of windings of 400 turns each. The diameter of the solenoid is \(1.8 \mathrm{~cm}\). If the current carried is \(8 \mathrm{~A}\), then the magnitude of the magnetic field inside the solenoid near its centre is approximately
- A \(1.5 \times 10^{-2} \mathrm{~T}\)
- B \(2.5 \times 10^{-2} \mathrm{~T}\)
- C \(3.5 \times 10^{-2} \mathrm{~T}\)
- D \(4.5 \times 10^{-2} \mathrm{~T}\)
Answer & Solution
Correct Answer
(B) \(2.5 \times 10^{-2} \mathrm{~T}\)
Step-by-step Solution
Detailed explanation
Length of Solenoid, \(\mathrm{L}=80 \mathrm{~cm}=0.8 \mathrm{~m}\) Diameter of a solenoid, \(\mathrm{d}=1.8 \mathrm{~cm}=0.018 \mathrm{~m}\) Current, \(\mathrm{i}=8 \mathrm{~A}\) Total number of turns. \(\mathrm{N}=5 \times 400=2000\) Number of turns per unit length…
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