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CSIR NET Physics Dec 2023 Year Question & Answer

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CSIR NET Physics Dec 2023 Year Question & Answer

CSIR NET Physics Dec 2023 Part A : Marks-2 Question 1: SCRIPT : DIRECTOR :: ??…

A long wire has a circular cross-section with radius `a`. The current density in the wire is `J(r) =J_0(a^2-r^2)/a^2` where `r` is the distance from the axis. Calculate the magnetic field at an arbitrary point inside or outside the wire.

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A long wire has a circular cross-section with radius `a`. The current density in the wire is `J(r) =J_0(a^2-r^2)/a^2` where `r` is the distance from the axis. Calculate the magnetic field at an arbitrary point inside or outside the wire.

Problem:  A long wire has a circular cross-section with radius `a`. The curre…

A steady current `I` flows down a long cylindrical wire of radius `a`. Find the magnetic field, both inside and outside the wire

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A steady current `I` flows down a long cylindrical wire of radius `a`. Find the magnetic field, both inside and outside the wire

Problem:  A steady current `I` flows down a long cylindrical wire of radius `…

An infinitely long hollow cylinder of radius `R` carrying a surface charge density `s` is rotated about its cylindrical axis with a constant angular speed `w`. The magnitude of the surface current is: [GATE 2005]

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An infinitely long hollow cylinder of radius `R` carrying a surface charge density `s` is rotated about its cylindrical axis with a constant angular speed `w`. The magnitude of the surface current is: [GATE 2005]

Problem:  An infinitely long hollow cylinder of radius `R` carrying a surface…

A ring of radius R carries a linear charge density `lambda`. It is rotating with angular speed `omega`. The magnetic field at its center is

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A ring of radius R carries a linear charge density `lambda`. It is rotating with angular speed `omega`. The magnetic field at its center is

Problem: A ring of radius R carries a linear charge density `lambda`. It is …

A very long solenoid (axis along z-direction) of n turns per unit length carries a current that increases linearly with time, `I=Kt`. What is the magnetic field inside the solenoid at a given time t? [JEST 2019]

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A very long solenoid (axis along z-direction) of n turns per unit length carries a current that increases linearly with time, `I=Kt`. What is the magnetic field inside the solenoid at a given time t? [JEST 2019]

Problem: A very long solenoid (axis along z-direction) of n turns per unit l…

A short solenoid with in turns per unit length has diameter D and length `L = (8D )/ 15` as shown in the figure, and it carries a constant current I. The magnetic field B at a point P on the axis of the solenoid at a distance `H = (2D)/ 3` from its near end (see figure) is

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A short solenoid with in turns per unit length has diameter D and length `L = (8D )/ 15` as shown in the figure, and it carries a constant current I. The magnetic field B at a point P on the axis of the solenoid at a distance `H = (2D)/ 3` from its near end (see figure) is

Problem: A short solenoid with in turns per unit length has diameter D and l…

A current I flows in the anticlockwise direction through a square loop of side a lying in the xoy plane with its center at the origin. The magnetic induction at the center of the square loop is

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A current I flows in the anticlockwise direction through a square loop of side a lying in the xoy plane with its center at the origin. The magnetic induction at the center of the square loop is

Important to note that, The magnetic field of a n-side polygon carrying curr…

A system of two circular co-axial coils carrying equal currents I along same direction having equalradius R and separated by a distance R (as shown in figure below). The magnetic field at the midpoint P is given by [JEST 2014]

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A system of two circular co-axial coils carrying equal currents I along same direction having equalradius R and separated by a distance R (as shown in figure below). The magnetic field at the midpoint P is given by [JEST 2014]

Problem:  A system of two circular co-axial coils carrying equal currents I a…

A set N concentric circular loops of wire, each carrying a steady current I in the same direction, is arranged in a plane. The radius of the first loop is`r_1` = a and the radius of the `n^(th)` loop is given by `r_n=nr_(n-1)`.The magnitude B of the magnetic field at the centre of the circles in the limit N→∞, is [NET JUNE 2017]

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A set N concentric circular loops of wire, each carrying a steady current I in the same direction, is arranged in a plane. The radius of the first loop is`r_1` = a and the radius of the `n^(th)` loop is given by `r_n=nr_(n-1)`.The magnitude B of the magnetic field at the centre of the circles in the limit N→∞, is [NET JUNE 2017]

Problem: A set N concentric circular loops of wire, each carrying a steady c…

Consider a thin long insulator coated conducting wire carrying current I. It is now wound once around an insulating thin disc of radius R to bring the wire back on the same side, as shown in the figure. The magnetic field at the centre of the disc is equal to

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Consider a thin long insulator coated conducting wire carrying current I. It is now wound once around an insulating thin disc of radius R to bring the wire back on the same side, as shown in the figure. The magnetic field at the centre of the disc is equal to

Problem:  Consider a thin long insulator coated conducting wire carrying curr…

An infinite conducting wire, which is bent in the shape of a hairpin (the curved part being a semicircle of radius` a = 1cm` ) as shown in the figure, carries a unit current

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An infinite conducting wire, which is bent in the shape of a hairpin (the curved part being a semicircle of radius` a = 1cm` ) as shown in the figure, carries a unit current

Problem: An infinite conducting wire, which is bent in the shape of a hairpi…

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