00. Magnetic Flux, Faraday's Law
Electro Magnetic Induction

154479 A circular coil of radius $10 \mathrm{~cm}$ and 50 turns is rotated about its vertical diameter with an angular speed of $20 \mathrm{rad} / \mathrm{s}$ in a uniform horizontal magnetic field of magnitude $7 \times 10^{-2} \mathrm{~T}$. If the closed loop of resistance of the coil is $20 \Omega$. The maximum value of current in the coil is

1 $0.08 \mathrm{~A}$
2 $0.06 \mathrm{~A}$
3 $0.15 \mathrm{~A}$
4 $0.11 \mathrm{~A}$
Electro Magnetic Induction

154480 The magnetic flux linked with a loop is $\phi=6 t^{2}+7 t+1$ where $\phi$ is in milli weber and $t$ is in second. What will be the e.m.f. induced at $\mathbf{t}=\mathbf{2}$ sec ?

1 $-49 \mathrm{mV}$
2 $-39 \mathrm{mV}$
3 $-31 \mathrm{mV}$
4 $-19 \mathrm{mV}$
Electro Magnetic Induction

154481 A wire of length $20 \mathrm{~cm}$ is moving with a velocity of $180 \mathrm{~m} \mathrm{~min}{ }^{-1}$ perpendicular to a magnetic field. If the induced emf in the wire is $3 \mathrm{~V}$, the magnitude of the field in tesla is

1 2
2 3
3 5
4 10
Electro Magnetic Induction

154482 A rectangular loop of area $A$ lies in a uniform magnetic field $\vec{B}$ with its plane perpendicular to the field as shown in figure (i). If the loop rotates through $90^{\circ}$ in a time $\frac{T}{4} s$ (Figure ii) from its initial position, then the emf induced during this interval is
[ $\hat{n}$ unit vector normal to the place of the loop]

(i)

1 0
2 $\frac{2 \mathrm{BA}}{\mathrm{T}}$
3 $\frac{4 \mathrm{BA}}{\mathrm{T}}$
4 $\frac{6 \mathrm{BA}}{\mathrm{T}}$
Electro Magnetic Induction

154483 A circular coil of area $0.01 \mathrm{~m}^{2}$ and 40 turns is rotated about its vertical diameter with an angular speed of 50 rad $\mathrm{s}^{-1}$ in a uniform horizontal magnetic field $0.05 \mathrm{~T}$. If the average power loss due to joule heating is $25 \mathrm{~mW}$. Then, the closed loop resistance of the coil is-

1 $50 \Omega$
2 $12.5 \Omega$
3 $75 \Omega$
4 $20 \Omega$
Electro Magnetic Induction

154479 A circular coil of radius $10 \mathrm{~cm}$ and 50 turns is rotated about its vertical diameter with an angular speed of $20 \mathrm{rad} / \mathrm{s}$ in a uniform horizontal magnetic field of magnitude $7 \times 10^{-2} \mathrm{~T}$. If the closed loop of resistance of the coil is $20 \Omega$. The maximum value of current in the coil is

1 $0.08 \mathrm{~A}$
2 $0.06 \mathrm{~A}$
3 $0.15 \mathrm{~A}$
4 $0.11 \mathrm{~A}$
Electro Magnetic Induction

154480 The magnetic flux linked with a loop is $\phi=6 t^{2}+7 t+1$ where $\phi$ is in milli weber and $t$ is in second. What will be the e.m.f. induced at $\mathbf{t}=\mathbf{2}$ sec ?

1 $-49 \mathrm{mV}$
2 $-39 \mathrm{mV}$
3 $-31 \mathrm{mV}$
4 $-19 \mathrm{mV}$
Electro Magnetic Induction

154481 A wire of length $20 \mathrm{~cm}$ is moving with a velocity of $180 \mathrm{~m} \mathrm{~min}{ }^{-1}$ perpendicular to a magnetic field. If the induced emf in the wire is $3 \mathrm{~V}$, the magnitude of the field in tesla is

1 2
2 3
3 5
4 10
Electro Magnetic Induction

154482 A rectangular loop of area $A$ lies in a uniform magnetic field $\vec{B}$ with its plane perpendicular to the field as shown in figure (i). If the loop rotates through $90^{\circ}$ in a time $\frac{T}{4} s$ (Figure ii) from its initial position, then the emf induced during this interval is
[ $\hat{n}$ unit vector normal to the place of the loop]

(i)

1 0
2 $\frac{2 \mathrm{BA}}{\mathrm{T}}$
3 $\frac{4 \mathrm{BA}}{\mathrm{T}}$
4 $\frac{6 \mathrm{BA}}{\mathrm{T}}$
Electro Magnetic Induction

154483 A circular coil of area $0.01 \mathrm{~m}^{2}$ and 40 turns is rotated about its vertical diameter with an angular speed of 50 rad $\mathrm{s}^{-1}$ in a uniform horizontal magnetic field $0.05 \mathrm{~T}$. If the average power loss due to joule heating is $25 \mathrm{~mW}$. Then, the closed loop resistance of the coil is-

1 $50 \Omega$
2 $12.5 \Omega$
3 $75 \Omega$
4 $20 \Omega$
Electro Magnetic Induction

154479 A circular coil of radius $10 \mathrm{~cm}$ and 50 turns is rotated about its vertical diameter with an angular speed of $20 \mathrm{rad} / \mathrm{s}$ in a uniform horizontal magnetic field of magnitude $7 \times 10^{-2} \mathrm{~T}$. If the closed loop of resistance of the coil is $20 \Omega$. The maximum value of current in the coil is

1 $0.08 \mathrm{~A}$
2 $0.06 \mathrm{~A}$
3 $0.15 \mathrm{~A}$
4 $0.11 \mathrm{~A}$
Electro Magnetic Induction

154480 The magnetic flux linked with a loop is $\phi=6 t^{2}+7 t+1$ where $\phi$ is in milli weber and $t$ is in second. What will be the e.m.f. induced at $\mathbf{t}=\mathbf{2}$ sec ?

1 $-49 \mathrm{mV}$
2 $-39 \mathrm{mV}$
3 $-31 \mathrm{mV}$
4 $-19 \mathrm{mV}$
Electro Magnetic Induction

154481 A wire of length $20 \mathrm{~cm}$ is moving with a velocity of $180 \mathrm{~m} \mathrm{~min}{ }^{-1}$ perpendicular to a magnetic field. If the induced emf in the wire is $3 \mathrm{~V}$, the magnitude of the field in tesla is

1 2
2 3
3 5
4 10
Electro Magnetic Induction

154482 A rectangular loop of area $A$ lies in a uniform magnetic field $\vec{B}$ with its plane perpendicular to the field as shown in figure (i). If the loop rotates through $90^{\circ}$ in a time $\frac{T}{4} s$ (Figure ii) from its initial position, then the emf induced during this interval is
[ $\hat{n}$ unit vector normal to the place of the loop]

(i)

1 0
2 $\frac{2 \mathrm{BA}}{\mathrm{T}}$
3 $\frac{4 \mathrm{BA}}{\mathrm{T}}$
4 $\frac{6 \mathrm{BA}}{\mathrm{T}}$
Electro Magnetic Induction

154483 A circular coil of area $0.01 \mathrm{~m}^{2}$ and 40 turns is rotated about its vertical diameter with an angular speed of 50 rad $\mathrm{s}^{-1}$ in a uniform horizontal magnetic field $0.05 \mathrm{~T}$. If the average power loss due to joule heating is $25 \mathrm{~mW}$. Then, the closed loop resistance of the coil is-

1 $50 \Omega$
2 $12.5 \Omega$
3 $75 \Omega$
4 $20 \Omega$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Electro Magnetic Induction

154479 A circular coil of radius $10 \mathrm{~cm}$ and 50 turns is rotated about its vertical diameter with an angular speed of $20 \mathrm{rad} / \mathrm{s}$ in a uniform horizontal magnetic field of magnitude $7 \times 10^{-2} \mathrm{~T}$. If the closed loop of resistance of the coil is $20 \Omega$. The maximum value of current in the coil is

1 $0.08 \mathrm{~A}$
2 $0.06 \mathrm{~A}$
3 $0.15 \mathrm{~A}$
4 $0.11 \mathrm{~A}$
Electro Magnetic Induction

154480 The magnetic flux linked with a loop is $\phi=6 t^{2}+7 t+1$ where $\phi$ is in milli weber and $t$ is in second. What will be the e.m.f. induced at $\mathbf{t}=\mathbf{2}$ sec ?

1 $-49 \mathrm{mV}$
2 $-39 \mathrm{mV}$
3 $-31 \mathrm{mV}$
4 $-19 \mathrm{mV}$
Electro Magnetic Induction

154481 A wire of length $20 \mathrm{~cm}$ is moving with a velocity of $180 \mathrm{~m} \mathrm{~min}{ }^{-1}$ perpendicular to a magnetic field. If the induced emf in the wire is $3 \mathrm{~V}$, the magnitude of the field in tesla is

1 2
2 3
3 5
4 10
Electro Magnetic Induction

154482 A rectangular loop of area $A$ lies in a uniform magnetic field $\vec{B}$ with its plane perpendicular to the field as shown in figure (i). If the loop rotates through $90^{\circ}$ in a time $\frac{T}{4} s$ (Figure ii) from its initial position, then the emf induced during this interval is
[ $\hat{n}$ unit vector normal to the place of the loop]

(i)

1 0
2 $\frac{2 \mathrm{BA}}{\mathrm{T}}$
3 $\frac{4 \mathrm{BA}}{\mathrm{T}}$
4 $\frac{6 \mathrm{BA}}{\mathrm{T}}$
Electro Magnetic Induction

154483 A circular coil of area $0.01 \mathrm{~m}^{2}$ and 40 turns is rotated about its vertical diameter with an angular speed of 50 rad $\mathrm{s}^{-1}$ in a uniform horizontal magnetic field $0.05 \mathrm{~T}$. If the average power loss due to joule heating is $25 \mathrm{~mW}$. Then, the closed loop resistance of the coil is-

1 $50 \Omega$
2 $12.5 \Omega$
3 $75 \Omega$
4 $20 \Omega$
Electro Magnetic Induction

154479 A circular coil of radius $10 \mathrm{~cm}$ and 50 turns is rotated about its vertical diameter with an angular speed of $20 \mathrm{rad} / \mathrm{s}$ in a uniform horizontal magnetic field of magnitude $7 \times 10^{-2} \mathrm{~T}$. If the closed loop of resistance of the coil is $20 \Omega$. The maximum value of current in the coil is

1 $0.08 \mathrm{~A}$
2 $0.06 \mathrm{~A}$
3 $0.15 \mathrm{~A}$
4 $0.11 \mathrm{~A}$
Electro Magnetic Induction

154480 The magnetic flux linked with a loop is $\phi=6 t^{2}+7 t+1$ where $\phi$ is in milli weber and $t$ is in second. What will be the e.m.f. induced at $\mathbf{t}=\mathbf{2}$ sec ?

1 $-49 \mathrm{mV}$
2 $-39 \mathrm{mV}$
3 $-31 \mathrm{mV}$
4 $-19 \mathrm{mV}$
Electro Magnetic Induction

154481 A wire of length $20 \mathrm{~cm}$ is moving with a velocity of $180 \mathrm{~m} \mathrm{~min}{ }^{-1}$ perpendicular to a magnetic field. If the induced emf in the wire is $3 \mathrm{~V}$, the magnitude of the field in tesla is

1 2
2 3
3 5
4 10
Electro Magnetic Induction

154482 A rectangular loop of area $A$ lies in a uniform magnetic field $\vec{B}$ with its plane perpendicular to the field as shown in figure (i). If the loop rotates through $90^{\circ}$ in a time $\frac{T}{4} s$ (Figure ii) from its initial position, then the emf induced during this interval is
[ $\hat{n}$ unit vector normal to the place of the loop]

(i)

1 0
2 $\frac{2 \mathrm{BA}}{\mathrm{T}}$
3 $\frac{4 \mathrm{BA}}{\mathrm{T}}$
4 $\frac{6 \mathrm{BA}}{\mathrm{T}}$
Electro Magnetic Induction

154483 A circular coil of area $0.01 \mathrm{~m}^{2}$ and 40 turns is rotated about its vertical diameter with an angular speed of 50 rad $\mathrm{s}^{-1}$ in a uniform horizontal magnetic field $0.05 \mathrm{~T}$. If the average power loss due to joule heating is $25 \mathrm{~mW}$. Then, the closed loop resistance of the coil is-

1 $50 \Omega$
2 $12.5 \Omega$
3 $75 \Omega$
4 $20 \Omega$