Moving Charges & Magnetism: NEET Physics Previous Year Questions

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

1. $A galvanometer of resistance 50Ω gives a full scale deflection for a current 5 \times 10^{- 4} A . The resistance that should be connected in series with\dots$
2. $A long solenoid has 200 turns per cm and carriers a current i . The magnetic field at its centre is 6.28 \times 10^{- 2} Wb / m^{2} . Another l\dots$
3. $A long cylindrical wire of radius R carries a uniform current I flowing through it. The variation of magnetic field with distance r from the axis of the wire is\dots$
4. $The electric current in a circular coil of 2 turns produces a magnetic induction B_{1} at its center. The coil is unwound and is rewound into a circular coil of 5 turns\dots$
5. $A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field perpendicular to the plane. Let\dots$
6. $A closely wound solenoid of 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm . If the current carried is\dots$
7. $A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the center of the coil is (Take, permeability of free spac\dots$
8. $A current carrying solenoid is placed vertically and a particle of mass m with charge Q is released from rest. The particle moves along the axis of solenoid. If g is acce\dots$
9. $A voltmeter of 250 mV range having a resistance of 10Ω is converted into an ammeter of 250 mA range. The value of necessary shunt is (nearly)$
10. $A beam of electrons is moving with constant velocity in a region having electric and magnetic fields of strength 20 V m^{- 1} and 0.5 T at right angles to the directi\dots$
11. $10 A current is flowing in two straight parallel wires in the same direction. Force of attraction between them is 1 \times 10^{- 3} N . If the current is\dots$
12. $A long current carrying wire produces a magnetic field of 1 T at a distance of r . The magnetic field (i) \frac{r}{2} (ii) 2 r and (ii) 3 r is$
13. $A circular coil carrying a certain current produces a magnetic field B_{0} at its centre. The coil is now rewound so as to have 3 turns and the same current is passe\dots$
14. $A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its vel\dots$
15. $A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed across this cross-section. The magnetic fie\dots$
16. $A beam of protons with speed 4 \times 10^{5} ms^{- 1} enters a uniform magnetic field of 0.3 T at an angle of 60^{\circ} to the magnetic field. The pit\dots$
17. $A magnetic field of 5 \times 10^{- 5} T is produced at a perpendicular distance of 0.2 m from a long straight wire carrying electric current. If the permeability of f\dots$
18. $Astraightwireofdiameter0.5mmcarrying a current of 1 A is replaced by the another wire of 1 mm diameter carrying the same current. The strength of the magnetic field far a\dots$
19. $A circular loop of radius r is carrying current I A. The ratio of magnetic field at the center of circular loop and at a distance r from the center of the loop on its axi\dots$
20. $Ionized hydrogen atoms and α ‐particles with same momenta enters perpendicular to a constant magnetic field, B . The ratio of their radii of their paths\dots$
21. $A charged particle carrying charge 1 μC is moving with velocity (2 i + 3 j + 4 k) m s^{- 1} . If an external magnetic field of\dots$
22. $The electric current in a circular coil of 2 turns produces a magnetic induction B_{1} at its centre. The coil is unwound and is rewound into a circular coil of 5 tu\dots$
23. $For parallel conductors and steady currents, the results in accordance with Newton's third law are$
24. $The magnetic field at the center of a current carrying loop of radius 0.1 m is 55 times that at a point along its axis. The distance of this point from\dots$
25. $The magnetic field at a distance r from a long wire carrying current i is 0.4 tesla. The magnetic field at a distance 2 r is$

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Moving Charges & Magnetism: NEET Physics Previous Year Questions

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