154680 A wheel with radial metal spokes $1 \mathrm{~m}$ in length is rotated in a magnetic field of $0.5 \times 10^{-4} \mathrm{~T}$ normal to the plane of the wheel. If the emf induced between the rim and axle is $\pi / 3000 \mathrm{~V}$, then the rotational speed of the wheel in revolutions per minute is
154681 A conducting bar of length $50 \mathrm{~cm}$ rotates with a constant angular speed of $100 \mathrm{rad} / \mathrm{sec}$ about a pivot at one end. If a uniform magnetic field of $0.1 \mathrm{~T}$ is directed perpendicular to the plane of rotation the emf induced between the ends of the bar is
154680 A wheel with radial metal spokes $1 \mathrm{~m}$ in length is rotated in a magnetic field of $0.5 \times 10^{-4} \mathrm{~T}$ normal to the plane of the wheel. If the emf induced between the rim and axle is $\pi / 3000 \mathrm{~V}$, then the rotational speed of the wheel in revolutions per minute is
154681 A conducting bar of length $50 \mathrm{~cm}$ rotates with a constant angular speed of $100 \mathrm{rad} / \mathrm{sec}$ about a pivot at one end. If a uniform magnetic field of $0.1 \mathrm{~T}$ is directed perpendicular to the plane of rotation the emf induced between the ends of the bar is
154680 A wheel with radial metal spokes $1 \mathrm{~m}$ in length is rotated in a magnetic field of $0.5 \times 10^{-4} \mathrm{~T}$ normal to the plane of the wheel. If the emf induced between the rim and axle is $\pi / 3000 \mathrm{~V}$, then the rotational speed of the wheel in revolutions per minute is
154681 A conducting bar of length $50 \mathrm{~cm}$ rotates with a constant angular speed of $100 \mathrm{rad} / \mathrm{sec}$ about a pivot at one end. If a uniform magnetic field of $0.1 \mathrm{~T}$ is directed perpendicular to the plane of rotation the emf induced between the ends of the bar is
154680 A wheel with radial metal spokes $1 \mathrm{~m}$ in length is rotated in a magnetic field of $0.5 \times 10^{-4} \mathrm{~T}$ normal to the plane of the wheel. If the emf induced between the rim and axle is $\pi / 3000 \mathrm{~V}$, then the rotational speed of the wheel in revolutions per minute is
154681 A conducting bar of length $50 \mathrm{~cm}$ rotates with a constant angular speed of $100 \mathrm{rad} / \mathrm{sec}$ about a pivot at one end. If a uniform magnetic field of $0.1 \mathrm{~T}$ is directed perpendicular to the plane of rotation the emf induced between the ends of the bar is