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Magnetic flux density ( ) of the magnetic field at a point on the axis of a long straight solenoid…
Magnetic flux density ($B$) of the magnetic field at a point on the axis of a long straight solenoid is given by:
- (a)$B = \mu_0 n I$
- (b)$B = \frac{\mu_0 I}{2r}$
- (c)$B = \frac{\mu_0 I}{4\pi r}$
- (d)$B = \mu_0 I$
Answer
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From ISC 2023 Specimen Physics Paper 1, question 1(A)(iii).