STANDARDPhysics-Electromagnetism
STANDARD Physics Magnetic Field in Solenoids MCQ Question
Type: MCQ-numerical-Medium-Class 12
A solenoid of length 0.6 m has a radius of 2 cm and is made up of 600 turns. If it carries a current of 4 A, then the magnitude of the magnetic field inside the solenoid is
A
6.024 × 10⁻³ T
B
8.024 × 10⁻³ T
C
5.024 × 10⁻³ T
D
7.024 × 10⁻³ T
Correct Answer
Option C
Detailed Explanation
The number of turns per meter n = 600/0.6 = 1000 turns/m. Using the formula B = μ₀nI, where μ₀ = 4π × 10⁻⁷ T·m/A, we get B = 4π × 10⁻⁷ × 1000 × 4 = 5.024 × 10⁻³ T.
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