02. Motional Electromotive Force (MEF)
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Electro Magnetic Induction

154716 A uniform magnetic field is restricted within a region of radius $r$. The magnetic field changes with time at a rate $\frac{d \vec{B}}{d t}$. Loop 1 of radius $R>r$ encloses the region $r$ and loop 2 of radius $R$ is outside the region of magnetic field as shown in the figure. Below then, the emf generated is

1 zero in loop 1 and zero in loop 2
2 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 2
3 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{R}^{2}$ in loop 1 and zero in loop 2
4 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and zero in loop 2
NEET- 2016
Electro Magnetic Induction

154718 A rectangular copper coil is placed in uniform magnetic field of induction $40 \mathrm{mT}$ with its plane perpendicular to the field. The area of the coil is shrinking at constant rate of $0.5 \mathrm{~m}^{2} \mathrm{~s}^{-1}$. The emf induced in the coil is.

1 $10 \mathrm{mV}$
2 $20 \mathrm{mV}$
3 $80 \mathrm{~m} \mathrm{~V}$
4 $40 \mathrm{~m} \mathrm{~V}$
AP EAMCET(Medical)-2015
Electro Magnetic Induction

154719 A wheel having metal spokes of $1 \mathrm{~m}$ long between its axle and rim is rotating in a magnetic field of flux density $5 \times 10^{-5} \mathrm{~T}$ normal to the plane of the wheel. An emf of $\frac{22}{7} \mathrm{mV}$ is produced between the rim and the axle
of the wheel. The rate of rotation of the wheel in revolution per second is:

1 $10 \pi$
2 $20 \pi$
3 $30 \pi$
4 $40 \pi$
AP EAMCET(Medical)-2002
Electro Magnetic Induction

154721 A metal rod of length $2 \mathrm{~m}$ is rotating with an angular velocity of $100 \mathrm{rad} / \mathrm{s}$ in a plane perpendicular to uniform magnetic field of 0.3 $T$. The potential difference between the ends of rod is

1 $30 \mathrm{~V}$
2 $40 \mathrm{~V}$
3 $60 \mathrm{~V}$
4 $600 \mathrm{~V}$
AP EMCET(Medical)-2010
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Electro Magnetic Induction

154716 A uniform magnetic field is restricted within a region of radius $r$. The magnetic field changes with time at a rate $\frac{d \vec{B}}{d t}$. Loop 1 of radius $R>r$ encloses the region $r$ and loop 2 of radius $R$ is outside the region of magnetic field as shown in the figure. Below then, the emf generated is

1 zero in loop 1 and zero in loop 2
2 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 2
3 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{R}^{2}$ in loop 1 and zero in loop 2
4 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and zero in loop 2
NEET- 2016
Electro Magnetic Induction

154718 A rectangular copper coil is placed in uniform magnetic field of induction $40 \mathrm{mT}$ with its plane perpendicular to the field. The area of the coil is shrinking at constant rate of $0.5 \mathrm{~m}^{2} \mathrm{~s}^{-1}$. The emf induced in the coil is.

1 $10 \mathrm{mV}$
2 $20 \mathrm{mV}$
3 $80 \mathrm{~m} \mathrm{~V}$
4 $40 \mathrm{~m} \mathrm{~V}$
AP EAMCET(Medical)-2015
Electro Magnetic Induction

154719 A wheel having metal spokes of $1 \mathrm{~m}$ long between its axle and rim is rotating in a magnetic field of flux density $5 \times 10^{-5} \mathrm{~T}$ normal to the plane of the wheel. An emf of $\frac{22}{7} \mathrm{mV}$ is produced between the rim and the axle
of the wheel. The rate of rotation of the wheel in revolution per second is:

1 $10 \pi$
2 $20 \pi$
3 $30 \pi$
4 $40 \pi$
AP EAMCET(Medical)-2002
Electro Magnetic Induction

154721 A metal rod of length $2 \mathrm{~m}$ is rotating with an angular velocity of $100 \mathrm{rad} / \mathrm{s}$ in a plane perpendicular to uniform magnetic field of 0.3 $T$. The potential difference between the ends of rod is

1 $30 \mathrm{~V}$
2 $40 \mathrm{~V}$
3 $60 \mathrm{~V}$
4 $600 \mathrm{~V}$
AP EMCET(Medical)-2010
NEET DIGITAL LIBRARY
Electro Magnetic Induction

154716 A uniform magnetic field is restricted within a region of radius $r$. The magnetic field changes with time at a rate $\frac{d \vec{B}}{d t}$. Loop 1 of radius $R>r$ encloses the region $r$ and loop 2 of radius $R$ is outside the region of magnetic field as shown in the figure. Below then, the emf generated is

1 zero in loop 1 and zero in loop 2
2 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 2
3 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{R}^{2}$ in loop 1 and zero in loop 2
4 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and zero in loop 2
NEET- 2016
Electro Magnetic Induction

154718 A rectangular copper coil is placed in uniform magnetic field of induction $40 \mathrm{mT}$ with its plane perpendicular to the field. The area of the coil is shrinking at constant rate of $0.5 \mathrm{~m}^{2} \mathrm{~s}^{-1}$. The emf induced in the coil is.

1 $10 \mathrm{mV}$
2 $20 \mathrm{mV}$
3 $80 \mathrm{~m} \mathrm{~V}$
4 $40 \mathrm{~m} \mathrm{~V}$
AP EAMCET(Medical)-2015
Electro Magnetic Induction

154719 A wheel having metal spokes of $1 \mathrm{~m}$ long between its axle and rim is rotating in a magnetic field of flux density $5 \times 10^{-5} \mathrm{~T}$ normal to the plane of the wheel. An emf of $\frac{22}{7} \mathrm{mV}$ is produced between the rim and the axle
of the wheel. The rate of rotation of the wheel in revolution per second is:

1 $10 \pi$
2 $20 \pi$
3 $30 \pi$
4 $40 \pi$
AP EAMCET(Medical)-2002
Electro Magnetic Induction

154721 A metal rod of length $2 \mathrm{~m}$ is rotating with an angular velocity of $100 \mathrm{rad} / \mathrm{s}$ in a plane perpendicular to uniform magnetic field of 0.3 $T$. The potential difference between the ends of rod is

1 $30 \mathrm{~V}$
2 $40 \mathrm{~V}$
3 $60 \mathrm{~V}$
4 $600 \mathrm{~V}$
AP EMCET(Medical)-2010
Join With Us for More Updates
Electro Magnetic Induction

154716 A uniform magnetic field is restricted within a region of radius $r$. The magnetic field changes with time at a rate $\frac{d \vec{B}}{d t}$. Loop 1 of radius $R>r$ encloses the region $r$ and loop 2 of radius $R$ is outside the region of magnetic field as shown in the figure. Below then, the emf generated is

1 zero in loop 1 and zero in loop 2
2 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 2
3 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{R}^{2}$ in loop 1 and zero in loop 2
4 $-\frac{\mathrm{dB}}{\mathrm{dt}} \pi \mathrm{r}^{2}$ in loop 1 and zero in loop 2
NEET- 2016
Electro Magnetic Induction

154718 A rectangular copper coil is placed in uniform magnetic field of induction $40 \mathrm{mT}$ with its plane perpendicular to the field. The area of the coil is shrinking at constant rate of $0.5 \mathrm{~m}^{2} \mathrm{~s}^{-1}$. The emf induced in the coil is.

1 $10 \mathrm{mV}$
2 $20 \mathrm{mV}$
3 $80 \mathrm{~m} \mathrm{~V}$
4 $40 \mathrm{~m} \mathrm{~V}$
AP EAMCET(Medical)-2015
Electro Magnetic Induction

154719 A wheel having metal spokes of $1 \mathrm{~m}$ long between its axle and rim is rotating in a magnetic field of flux density $5 \times 10^{-5} \mathrm{~T}$ normal to the plane of the wheel. An emf of $\frac{22}{7} \mathrm{mV}$ is produced between the rim and the axle
of the wheel. The rate of rotation of the wheel in revolution per second is:

1 $10 \pi$
2 $20 \pi$
3 $30 \pi$
4 $40 \pi$
AP EAMCET(Medical)-2002
Electro Magnetic Induction

154721 A metal rod of length $2 \mathrm{~m}$ is rotating with an angular velocity of $100 \mathrm{rad} / \mathrm{s}$ in a plane perpendicular to uniform magnetic field of 0.3 $T$. The potential difference between the ends of rod is

1 $30 \mathrm{~V}$
2 $40 \mathrm{~V}$
3 $60 \mathrm{~V}$
4 $600 \mathrm{~V}$
AP EMCET(Medical)-2010
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here