The Experiments of Faraday and Henry
PHXII06:ELECTROMAGNETIC INDUCTION

358637 Induced emf in the coil depends upon

1 conductivity of coil
2 amount of flux
3 rate of change of linked flux
4 resistance of coil
PHXII06:ELECTROMAGNETIC INDUCTION

358638 A uniform magnetic field is restricted within a region of radius \(r\). The magnetic field changes with time at a rate \(\dfrac{d \vec{B}}{d t}\). 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 e.m.f. generated is
supporting img

1 Zero in loop 1 and zero in loop 2
2 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) loop 2
3 \(-\dfrac{d \vec{B}}{d t} \pi R^{2}\) in loop 1 and zero in loop 2
4 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and zero in loop 2
PHXII06:ELECTROMAGNETIC INDUCTION

358639 The flux linked with a circuit is given by \(\phi=t^{3}+3 t-7\). The graph between time (x-axis) and induced emf (y-axis) will be

1 Parabola not through the origin
2 Straight line through the origin
3 Parabola through the origin
4 Straight line with positive intercept
PHXII06:ELECTROMAGNETIC INDUCTION

358640 A coil has 2000 turns and area of \(70\;c{m^2}\). The magnetic field perpendicular to the plane of the coil is \(0.3\;Wb/{m^2}\) and takes \(0.1\sec \) to rotate through \(180^{\circ}\). The value of the induced e.m.f. will be

1 \(84\;V\)
2 \(8.4\;V\)
3 \(4.2\;V\)
4 \(42\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358637 Induced emf in the coil depends upon

1 conductivity of coil
2 amount of flux
3 rate of change of linked flux
4 resistance of coil
PHXII06:ELECTROMAGNETIC INDUCTION

358638 A uniform magnetic field is restricted within a region of radius \(r\). The magnetic field changes with time at a rate \(\dfrac{d \vec{B}}{d t}\). 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 e.m.f. generated is
supporting img

1 Zero in loop 1 and zero in loop 2
2 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) loop 2
3 \(-\dfrac{d \vec{B}}{d t} \pi R^{2}\) in loop 1 and zero in loop 2
4 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and zero in loop 2
PHXII06:ELECTROMAGNETIC INDUCTION

358639 The flux linked with a circuit is given by \(\phi=t^{3}+3 t-7\). The graph between time (x-axis) and induced emf (y-axis) will be

1 Parabola not through the origin
2 Straight line through the origin
3 Parabola through the origin
4 Straight line with positive intercept
PHXII06:ELECTROMAGNETIC INDUCTION

358640 A coil has 2000 turns and area of \(70\;c{m^2}\). The magnetic field perpendicular to the plane of the coil is \(0.3\;Wb/{m^2}\) and takes \(0.1\sec \) to rotate through \(180^{\circ}\). The value of the induced e.m.f. will be

1 \(84\;V\)
2 \(8.4\;V\)
3 \(4.2\;V\)
4 \(42\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358637 Induced emf in the coil depends upon

1 conductivity of coil
2 amount of flux
3 rate of change of linked flux
4 resistance of coil
PHXII06:ELECTROMAGNETIC INDUCTION

358638 A uniform magnetic field is restricted within a region of radius \(r\). The magnetic field changes with time at a rate \(\dfrac{d \vec{B}}{d t}\). 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 e.m.f. generated is
supporting img

1 Zero in loop 1 and zero in loop 2
2 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) loop 2
3 \(-\dfrac{d \vec{B}}{d t} \pi R^{2}\) in loop 1 and zero in loop 2
4 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and zero in loop 2
PHXII06:ELECTROMAGNETIC INDUCTION

358639 The flux linked with a circuit is given by \(\phi=t^{3}+3 t-7\). The graph between time (x-axis) and induced emf (y-axis) will be

1 Parabola not through the origin
2 Straight line through the origin
3 Parabola through the origin
4 Straight line with positive intercept
PHXII06:ELECTROMAGNETIC INDUCTION

358640 A coil has 2000 turns and area of \(70\;c{m^2}\). The magnetic field perpendicular to the plane of the coil is \(0.3\;Wb/{m^2}\) and takes \(0.1\sec \) to rotate through \(180^{\circ}\). The value of the induced e.m.f. will be

1 \(84\;V\)
2 \(8.4\;V\)
3 \(4.2\;V\)
4 \(42\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358637 Induced emf in the coil depends upon

1 conductivity of coil
2 amount of flux
3 rate of change of linked flux
4 resistance of coil
PHXII06:ELECTROMAGNETIC INDUCTION

358638 A uniform magnetic field is restricted within a region of radius \(r\). The magnetic field changes with time at a rate \(\dfrac{d \vec{B}}{d t}\). 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 e.m.f. generated is
supporting img

1 Zero in loop 1 and zero in loop 2
2 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) loop 2
3 \(-\dfrac{d \vec{B}}{d t} \pi R^{2}\) in loop 1 and zero in loop 2
4 \(-\dfrac{d \vec{B}}{d t} \pi r^{2}\) in loop 1 and zero in loop 2
PHXII06:ELECTROMAGNETIC INDUCTION

358639 The flux linked with a circuit is given by \(\phi=t^{3}+3 t-7\). The graph between time (x-axis) and induced emf (y-axis) will be

1 Parabola not through the origin
2 Straight line through the origin
3 Parabola through the origin
4 Straight line with positive intercept
PHXII06:ELECTROMAGNETIC INDUCTION

358640 A coil has 2000 turns and area of \(70\;c{m^2}\). The magnetic field perpendicular to the plane of the coil is \(0.3\;Wb/{m^2}\) and takes \(0.1\sec \) to rotate through \(180^{\circ}\). The value of the induced e.m.f. will be

1 \(84\;V\)
2 \(8.4\;V\)
3 \(4.2\;V\)
4 \(42\;V\)