The net magnetic flux through any closed surface, kept in uniform magnetic field is:

 1 zero 2 $$\dfrac{\mu_{0}}{4 \pi}$$ 3 $$4\pi μ_{0}$$ 4 $$\dfrac{4\mu_{0}}{\pi}$$
Subtopic:  Magnetic Flux |
94%
From NCERT
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A circular disc of radius $$0.2$$ m is placed in a uniform magnetic field of induction $$\frac{1}{\pi} \left(\frac{\text{Wb}}{\text{m}^{2}}\right)$$ in such a way that its axis makes an angle of $$60^{\circ}$$ with $$\vec {B}.$$ The magnetic flux linked to the disc will be:

 1 $$0.02$$ Wb 2 $$0.06$$ Wb 3 $$0.08$$ Wb 4 $$0.01$$ Wb
Subtopic:  Magnetic Flux |
86%
From NCERT
NEET - 2008
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If a current is passed through a circular loop of radius $$R$$ then magnetic flux through a coplanar square loop of side $$l$$ as shown in the figure $$(l<<R)$$ is:

 1 $$\frac{\mu_{0} l}{2} \frac{R^{2}}{l}$$ 2 $$\frac{\mu_{0} I l^{2}}{2 R}$$ 3 $$\frac{\mu_{0} l \pi R^{2}}{2 l}$$ 4 $$\frac{\mu_{0} \pi R^{2} I}{l}$$
Subtopic:  Magnetic Flux |
82%
From NCERT
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The radius of a loop as shown in the figure is $$10~\text{cm}.$$ If the magnetic field is uniform and has a value $$10^{-2}~ \text{T},$$ then the flux through the loop will be:

 1 $$2 \pi \times 10^{-2}~\text{Wb}$$ 2 $$3 \pi \times 10^{-4}~\text{Wb}$$ 3 $$5 \pi \times 10^{-5}~\text{Wb}$$ 4 $$5 \pi \times 10^{-4}~\text{Wb}$$
Subtopic:  Magnetic Flux |
76%
From NCERT
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A square of side $$L$$ meters lies in the $$XY\text-$$plane in a region where the magnetic field is given by $$\vec{B}=B_{0}\left ( 2\hat{i} +3\hat{j}+4\hat{k}\right )\text{T}$$ where $$B_{0}$$ is constant. The magnitude of flux passing through the square will be:
1. $$2 B_{0} L^{2}~\text{Wb}$$
2. $$3 B_{0} L^{2}~\text{Wb}$$
3. $$4 B_{0} L^{2}~\text{Wb}$$
4. $$\sqrt{29} B_{0} L^{2}~\text{Wb}$$

Subtopic:  Magnetic Flux |
72%
From NCERT
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What is the dimensional formula of magnetic flux?
1. $$\left[ M L^2 T^{-2}A^{-1}\right]$$
2. $$\left[ M L^1 T^{-1}A^{-2}\right]$$
3. $$\left[ M L^2 T^{-3}A^{-1}\right]$$
4. $$\left[ M L^{-2} T^{-2}A^{-2}\right]$$

Subtopic:  Magnetic Flux |
72%
From NCERT
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A square loop of side $$1$$ m and resistance $$1$$ $$\Omega$$ is placed in a magnetic field of $$0.5$$ T. If the plane of the loop is perpendicular to the direction of the magnetic field, the magnetic flux through the loop is:
 1 $$0$$ 2 $$2$$ weber 3 $$0.5$$ weber 4 $$1$$ weber
Subtopic:  Magnetic Flux |
66%
From NCERT
NEET - 2022
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A circular loop of radius $$R$$ carrying current $$i$$ lies in the $$x\text-y$$ plane. If the centre of the loop coincides with the origin, then the total magnetic flux passing through the $$x\text-y$$ plane will be:
 1 directly proportional to $$i$$. 2 directly proportional to $$R$$. 3 directly proportional to $$R^2$$. 4 Zero.
Subtopic:  Magnetic Flux |
58%
From NCERT
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The magnetic flux linked with a coil varies with time as $$\phi = 2t^2-6t+5,$$ where $$\phi$$ is in Weber and $$t$$ is in seconds. The induced current is zero at:
1. $$t=0$$
2. $$t= 1.5~\text{s}$$
3. $$t=3~\text{s}$$
4. $$t=5~\text{s}$$

Subtopic:  Faraday's Law & Lenz Law |
90%
From NCERT
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A coil having number of turns $$N$$ and cross-sectional area $$A$$ is rotated in a uniform magnetic field $$B$$ with an angular velocity $$\omega$$. The maximum value of the emf induced in it is:
1. $$\frac{NBA}{\omega}$$
2. $$NBAω$$
3. $$\frac{NBA}{\omega^{2}}$$
4. $$NBAω^{2}$$

Subtopic:  Faraday's Law & Lenz Law |
88%
From NCERT
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