Physics · 2020
NEET 2020 · 14 October · Code Z6 · Q133
A wheel with 20 metallic spokes each 1 m long is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic field of 0.4 G. The induced…
A wheel with $\displaystyle 20$ metallic spokes each $\displaystyle 1$ m long is rotated with a speed of $\displaystyle 120$ rpm in a plane perpendicular to a magnetic field of $\displaystyle 0.4$ G. The induced emf between the axle and rim of the wheel will be. ( $\displaystyle 1 \mathrm{G}=10^{-4} \mathrm{~T}$ )
Official answer
(4)
$\displaystyle 2.51 \times 10^{-4} \mathrm{~V}$
More from Electromagnetic Induction
- A thin semicircular conducting ring (PQR) of radius 'r' is falling with its plane vertical in a horizontal magnetic field B, as shown in figure. The…2014
- Consider a long solenoid of length l and radius r. If n is the number of turns per unit length and μ_0 is the permeability of free space, the…2026
- A conducting circular loop is placed in a uniform magnetic field, B=.025 T with its plane perpendicular to the loop. The radius of the loop is made…2010
- In which of the following devices, the eddy current effect is not used?2019
- Figure shows a circuit that contains three identical resistors with resistance R=9.0 Ω each, two identical inductors with inductance L=2.0 mH each,…2017
- A square loop of side 1 m and resistance 1 Ω is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the direction of…2022
- Two conducting circular loops of radii R_1 and R_2 are placed in the same plane with their centres coinciding. If R_1 ≫ R_2, the mutual inductance M…2021
- A long solenoid of diameter 0.1 m has 2 × 10^4 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with…2017
NEET (UG) 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.