JEE Main 26-Aug-2021 Shift 2 Solved Paper

Magnetic induction
Magnetic force of induction can be given as
F=qvB
⇒ B=

F

qv

[B]=

[F]

[q][v]

=

[MLT−2]

[AT][LT−1]

=[M1T−2A−1]
Magnetic Flux Magnetic flux is the product of magnetic inductionand area.
ϕ = B ⋅ A
[ϕ]=[B][A]=[M1T−2A−1][L2]
=[ML2T−2A−1]
Magnetic permeability
We know that, magnetic field inside the solenoid.
B=μ0nI
⇒ μ0=

B

nl

(where, n is number of turns per unit length)
⇒[μ0]=

[B]

[n][l]

=

[MT−2A−1]

[L−1][A]

=[MLT−2A−2]
Magnetisation The magnetic dipole moment acquired per unitvolume is known as magnetisation.
I=

M

V

[l]=

[L2A]

[L3]

=[L−1A]
Hence, no option is correct.