Magnetism & Matter: NEET Physics Previous Year Questions

164 previous year questions from Magnetism & Matter. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4 π \times 1 0^{- 7} H / m . Absolute permeability of the material of the rod is:$
2. $A paramagnetic sample shows a net magnetization of 8 A m^{- 1} when placed in an external magnetic field of 0.6 T at a temperature of\dots$
3. $A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It$
4. $The Curie temperature T_{C} represents$
5. $A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by 6 0^{o} is W . N\dots$
6. $A solid metal cube of edge length 2 cm is moving in a positive y -direction at a constant speed of 6 m/s. There is a uniform magnetic field of 0.1 T in th\dots$
7. $A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A The coercivity of the bar magne\dots$
8. $A magnetic dipole of magnetic moment 6 \times 10^{- 2} A m^{2} and moment of inertia 12 \times 10^{- 6} kg m^{2} performs oscilla\dots$
9. $In the hysteresis curve the value of magnetization (B) which will be present in a substance when value of magnetizing force (H) is made\dots$
10. $A paramagnetic sample showing a net magnetisation of 0.8 Am^{- 1}, when placed in an external magnetic field of strength 0.8 T, at a temperature\dots$
11. $What will be the nature of flow of water from a circular tap, when its flow rate increased from 0. \frac{18 L}{min} to 0. \frac{48 L}{min} ? The rad\dots$
12. $The period of oscillation of a bar magnet at a place is 2 s . At the same place, the period of oscillation of another identical bar magnet whose magnetic moment i\dots$
13. $Young’s modulus of two wires A and B are in the ratio 7 : 4. Wire A is 2 m long and has radius R. Wire A is 2 m long and has radius R. Wire B is 1.5 m long and has radius\dots$
14. $A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a particleto that of electron is 2 : 1, the mass of the\dots$
15. $A compass needle oscillates 20 times per minute at a place where the dip is 45^{\circ} and the magnetic field is B_{1} . The same needle oscillates 30 times per\dots$
16. $Two identical photocathodes receive the light of frequencies f_{1} and f_{2} respectively. If the velocities of the photo-electrons coming out are V_{1} and\dots$
17. $The de-Broglie wavelength associated with an electron and a proton were calculated by accelerating then through same potential of 100 V . What should nearly be the ratio\dots$
18. $The susceptibility of a ferromagnetic substance is$
19. $The susceptibility of A 1 is 2 \times 10^{- 5} . The percent increase in the magnetic field when the space within a current carrying toroid to filled with\dots$
20. $A bar magnet has coercivity 4 \times 10^{3} Am^{- 1} . It is placed inside a solenoid of 12 cm length and 60 turns. The current that should be p\dots$
21. $Needles N_{1}, N_{2} and N_{3} are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them\dots$
22. $A magnetic dipole of moment 2.5 Am^{2} is free to rotate about a vertical axis passing through its centre. It is released from East-West direction. Its kinetic\dots$
23. $The ratio of surface tensions of mercury and water is given to be 7.5 while the ratio of their densities is 13.6. Their contact angles, with glass, are close to 135° an\dots$
24. $The strength of the Earth's magnetic field is$
25. $At certain place, the horizontal component of earth's magnetic field is 3.0 G and the angle of dip at that place is 30^{\circ} . The magnetic field of earth at tha\dots$

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Magnetism & Matter: NEET Physics Previous Year Questions

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