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GATE-PH SERIES
Physics

Magnetic Effects Of Current And Magnetism

6 previous year questions.

Volume: 6 Ques
Yield: Medium

High-Yield Trend

6
2025

Chapter Questions
6 MCQs

01
PYQ 2025
medium
physics ID: gate-ph-
The effective magnetic moment (in units of Bohr magneton) for the ground state of an isolated 4𝑓 ion with 6 unpaired electrons in the 4𝑓 shell according to Hund’s rules is (in integer) _____
02
PYQ 2025
medium
physics ID: gate-ph-
Cyclotrons are used to accelerate ions like deuterons ( ) and particles. Keeping the magnetic field the same for both, and are extracted with energies 10 MeV and 20 MeV with extraction radii and , respectively. Taking the masses and , the value of (in integer) is:
03
PYQ 2025
medium
physics ID: gate-ph-
Cyclotrons are used to accelerate ions like deuterons ( ) and particles. Keeping the magnetic field the same for both, and are extracted with energies 10 MeV and 20 MeV with extraction radii and , respectively. Taking the masses and , the value of (in integer) is:
04
PYQ 2025
medium
physics ID: gate-ph-
A linear magnetic material in the form of a cylinder of radius and length is placed with its axis parallel to the -axis. The cylinder has uniform magnetization . Which of the following option(s) is/are correct?
1
The magnetic field at any point outside the cylinder can be expressed as the gradient of a scalar function
2
The bound volume current density is zero
3
The surface current density on the curved surface is non-zero
4
The surface current densities on the flat surfaces (top and bottom) are non-zero
05
PYQ 2025
medium
physics ID: gate-ph-

The wire loop shown in the figure carries a steady current . Each straight section of the loop has length . A part of the loop lies in the -plane and the other part is tilted at with respect to the -plane. The magnitude of the magnetic dipole moment of the loop (in appropriate units) is:


Β 

1

2

3

4
06
PYQ 2025
medium
physics ID: gate-ph-

The effective magnetic moment (in units of Bohr magneton) for the ground state of an isolated 4𝑓 ion with 6 unpaired electrons in the 4𝑓 shell according to Hund’s rules is (in integer) _____

About Magnetic Effects Of Current And Magnetism - GATE-PH

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