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Assertion: Basic difference between an electric line and magnetic line of force is that former is discontinuous and the latter is continuous or endless. Reason: No electric lines of forces exist inside a charged conductor but magnetic lines do exist inside a

asked Mar 20, 2022 in 12th Physics

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Assertion: According to Gauss’s law for magnetism, the net magnetic flux through any closed surface is zero. Reason: The number of magnetic field lines leaving the surface is balanced by the number of lines entering

asked Mar 20, 2022 in 12th Physics

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Assertion: The true geographic north direction can be found by using a compass needle. Reason: The magnetic meridian of the earth is along the axis of rotation of the

asked Mar 20, 2022 in 12th Physics

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Earth’s Magnetic FieldThe magnetic field lines of the earth resemble that of a hypothetical magnetic dipole located at the centre of the earth. The axis of the dipole is presently tilted by approximately 11.3° with respect to the axis of rotation of the earth.The pole near the geographic north pole of the earth is called the north magnetic pole and the pole near the geographic south pole is called south magnetic pole.The strength of the earth’s magnetic field varies from place-to-place on the earth’s surface, its value being of the order

asked Mar 20, 2022 in 12th Physics

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Earth’s Magnetic FieldThe magnetic field lines of the earth resemble that of a hypothetical magnetic dipole located at the centre of the earth. The axis of the dipole is presently tilted by approximately 11.3° with respect to the axis of rotation of the earth.The pole near the geographic north pole of the earth is called the north magnetic pole and the pole near the geographic south pole is called south magnetic pole.A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from centre of

asked Mar 20, 2022 in 12th Physics

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Earth’s Magnetic FieldThe magnetic field lines of the earth resemble that of a hypothetical magnetic dipole located at the centre of the earth. The axis of the dipole is presently tilted by approximately 11.3° with respect to the axis of rotation of the earth.The pole near the geographic north pole of the earth is called the north magnetic pole and the pole near the geographic south pole is called south magnetic pole.The value of angle of dip is zero at the magnetic equator because on

asked Mar 20, 2022 in 12th Physics

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Earth’s Magnetic FieldThe magnetic field lines of the earth resemble that of a hypothetical magnetic dipole located at the centre of the earth. The axis of the dipole is presently tilted by approximately 11.3° with respect to the axis of rotation of the earth.The pole near the geographic north pole of the earth is called the north magnetic pole and the pole near the geographic south pole is called south magnetic pole.The angle of dip at a certain place, where the horizontal and vertical components of the earth’s magnetic field are equal,

asked Mar 20, 2022 in 12th Physics

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Earth’s Magnetic FieldThe magnetic field lines of the earth resemble that of a hypothetical magnetic dipole located at the centre of the earth. The axis of the dipole is presently tilted by approximately 11.3° with respect to the axis of rotation of the earth.The pole near the geographic north pole of the earth is called the north magnetic pole and the pole near the geographic south pole is called south magnetic pole.At a place, angle of dip is 30°. If horizontal component of earth’s magnetic field is `H_e`` then the total intensity of magnetic field will

asked Mar 20, 2022 in 12th Physics

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Gauss Law in Magnetism We can write Gauss’s law for magnetostatics as `intB.dA=mu_0m`, where, `intB •dA`. is the magnetic flux and m is the net magnetic pole strength inside a closed surface. It was found that, magnetic flux through a closed surface is always zero, thus we reach at a conclusion that magnetic monopoles do not exist. A bar magnet always attain north-south poles no matter how many times it is cut into pieces.The net magnetic flux due to a bar magnet over a closed surface

asked Mar 20, 2022 in 12th Physics

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Gauss Law in Magnetism We can write Gauss’s law for magnetostatics as `intB.dA=mu_0m`, where, `intB •dA`. is the magnetic flux and m is the net magnetic pole strength inside a closed surface. It was found that, magnetic flux through a closed surface is always zero, thus we reach at a conclusion that magnetic monopoles do not exist. A bar magnet always attain north-south poles no matter how many times it is cut into pieces.The presence of magnetic monopoles is ruled out

asked Mar 20, 2022 in 12th Physics

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Gauss Law in Magnetism We can write Gauss’s law for magnetostatics as `intB.dA=mu_0m`, where, `intB •dA`. is the magnetic flux and m is the net magnetic pole strength inside a closed surface. It was found that, magnetic flux through a closed surface is always zero, thus we reach at a conclusion that magnetic monopoles do not exist. A bar magnet always attain north-south poles no matter how many times it is cut into pieces.A bar magnet is separated four times, the number of monopoles and dipoles formed

asked Mar 20, 2022 in 12th Physics

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Gauss Law in Magnetism We can write Gauss’s law for magnetostatics as `intB.dA=mu_0m`, where, `intB •dA`. is the magnetic flux and m is the net magnetic pole strength inside a closed surface. It was found that, magnetic flux through a closed surface is always zero, thus we reach at a conclusion that magnetic monopoles do not exist. A bar magnet always attain north-south poles no matter how many times it is cut into pieces.The number of magnetic field lines passing through a surface area normally is

asked Mar 20, 2022 in 12th Physics

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Gauss Law in Magnetism We can write Gauss’s law for magnetostatics as `intB.dA=mu_0m`, where, `intB •dA`. is the magnetic flux and m is the net magnetic pole strength inside a closed surface. It was found that, magnetic flux through a closed surface is always zero, thus we reach at a conclusion that magnetic monopoles do not exist. A bar magnet always attain north-south poles no matter how many times it is cut into pieces.The dimensional representation of magnetic flux density

asked Mar 20, 2022 in 12th Physics

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The dimensions of magnetic flux

asked Mar 20, 2022 in 12th Physics

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A circular disc of radius `0.2 m` is placed in a uniform magnetic field of induction `(1'/'pi) Wbm^(-2)` in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc

asked Mar 20, 2022 in 12th Physics

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According to Faraday’s law of electromagnetic induction, the magnitude of the induced emf in a circuit is equal to the time rate of change

asked Mar 20, 2022 in 12th Physics

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The flux linked with a circuit is given by `phiB = t^2 +2`. The graph between time (X-axis) and induced emf (Y-axis) will be

asked Mar 20, 2022 in 12th Physics

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A square loop of wire, side length `10 cm` is placed at angle of 45° with a magnetic field that changes uniformly from 0.1 T to zero in `0.7s`. The induced current in the loop (its resistance is 111)

asked Mar 20, 2022 in 12th Physics

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Lenz’s law of electromagnetic induction corresponds to the law of conservation

asked Mar 20, 2022 in 12th Physics

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The North-pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of induced current in the conducting plane will

asked Mar 20, 2022 in 12th Physics

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