engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Physics Magnetism and Maxwell's Equations Magnets
A long straight solenoid with cross sectional radius 'a' and number of turns per unit length 'n' has a current varying with time as I(As−1). The magnitude of the electric field as a function of distance 'r' from the solenoid axis is
1
\(\frac{n \mu_{0}a^{2}I}{2r}\)
2
\(\frac{\mu_{0} \text{In}}{2a}\)
3
\(\frac{na^{2}I}{2 \mu_{0} r}\)
4
\(\frac{\mu_{0} Ia}{2n}\)