02. Motional Electromotive Force (MEF)
Electro Magnetic Induction

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

1 400
2 500
3 600
4 700
Electro Magnetic Induction

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

1 $5 \mathrm{~V}$
2 $1.25 \mathrm{~V}$
3 $4.5 \mathrm{~V}$
4 $2.75 \mathrm{~V}$
Electro Magnetic Induction

154682 A straight conductor of length $2 \mathrm{~m}$ moves with a velocity of $2 \mathrm{~m} / \mathrm{s}$ in a magnetic field of induction $0.5 \mathrm{~Wb} / \mathrm{m}^{2}$ and perpendicular to it. The emf induced in the conductor is

1 $2 \mathrm{~V}$
2 $1 \mathrm{~V}$
3 $0.5 \mathrm{~V}$
4 $3 \mathrm{~V}$
Electro Magnetic Induction

154684 A generator with a circular coil of 100 turns of area $2 \times 10^{-2} \mathrm{~m}^{2}$ is immersed in a $0.01 \mathrm{~T}$ magnetic field and rotated at a frequency of 50 Hz. The maximum emf which is produced during a cycle is

1 $6.28 \mathrm{~V}$
2 $3.44 \mathrm{~V}$
3 $10 \mathrm{~V}$
4 $1.32 \mathrm{~V}$
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Electro Magnetic Induction

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

1 400
2 500
3 600
4 700
Electro Magnetic Induction

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

1 $5 \mathrm{~V}$
2 $1.25 \mathrm{~V}$
3 $4.5 \mathrm{~V}$
4 $2.75 \mathrm{~V}$
Electro Magnetic Induction

154682 A straight conductor of length $2 \mathrm{~m}$ moves with a velocity of $2 \mathrm{~m} / \mathrm{s}$ in a magnetic field of induction $0.5 \mathrm{~Wb} / \mathrm{m}^{2}$ and perpendicular to it. The emf induced in the conductor is

1 $2 \mathrm{~V}$
2 $1 \mathrm{~V}$
3 $0.5 \mathrm{~V}$
4 $3 \mathrm{~V}$
Electro Magnetic Induction

154684 A generator with a circular coil of 100 turns of area $2 \times 10^{-2} \mathrm{~m}^{2}$ is immersed in a $0.01 \mathrm{~T}$ magnetic field and rotated at a frequency of 50 Hz. The maximum emf which is produced during a cycle is

1 $6.28 \mathrm{~V}$
2 $3.44 \mathrm{~V}$
3 $10 \mathrm{~V}$
4 $1.32 \mathrm{~V}$
Electro Magnetic Induction

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

1 400
2 500
3 600
4 700
Electro Magnetic Induction

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

1 $5 \mathrm{~V}$
2 $1.25 \mathrm{~V}$
3 $4.5 \mathrm{~V}$
4 $2.75 \mathrm{~V}$
Electro Magnetic Induction

154682 A straight conductor of length $2 \mathrm{~m}$ moves with a velocity of $2 \mathrm{~m} / \mathrm{s}$ in a magnetic field of induction $0.5 \mathrm{~Wb} / \mathrm{m}^{2}$ and perpendicular to it. The emf induced in the conductor is

1 $2 \mathrm{~V}$
2 $1 \mathrm{~V}$
3 $0.5 \mathrm{~V}$
4 $3 \mathrm{~V}$
Electro Magnetic Induction

154684 A generator with a circular coil of 100 turns of area $2 \times 10^{-2} \mathrm{~m}^{2}$ is immersed in a $0.01 \mathrm{~T}$ magnetic field and rotated at a frequency of 50 Hz. The maximum emf which is produced during a cycle is

1 $6.28 \mathrm{~V}$
2 $3.44 \mathrm{~V}$
3 $10 \mathrm{~V}$
4 $1.32 \mathrm{~V}$
Electro Magnetic Induction

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

1 400
2 500
3 600
4 700
Electro Magnetic Induction

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

1 $5 \mathrm{~V}$
2 $1.25 \mathrm{~V}$
3 $4.5 \mathrm{~V}$
4 $2.75 \mathrm{~V}$
Electro Magnetic Induction

154682 A straight conductor of length $2 \mathrm{~m}$ moves with a velocity of $2 \mathrm{~m} / \mathrm{s}$ in a magnetic field of induction $0.5 \mathrm{~Wb} / \mathrm{m}^{2}$ and perpendicular to it. The emf induced in the conductor is

1 $2 \mathrm{~V}$
2 $1 \mathrm{~V}$
3 $0.5 \mathrm{~V}$
4 $3 \mathrm{~V}$
Electro Magnetic Induction

154684 A generator with a circular coil of 100 turns of area $2 \times 10^{-2} \mathrm{~m}^{2}$ is immersed in a $0.01 \mathrm{~T}$ magnetic field and rotated at a frequency of 50 Hz. The maximum emf which is produced during a cycle is

1 $6.28 \mathrm{~V}$
2 $3.44 \mathrm{~V}$
3 $10 \mathrm{~V}$
4 $1.32 \mathrm{~V}$