This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > Class 12 Physics (Part I) Chapter 5 Magnetism And Matter – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 5 Magnetism And Matter Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the components of the electromagnets? A) Battery, wire and bulb. B) Battery, copper wire and paper clips. C) Battery, copper wire and iron nail. D) Battery, wire and aluminum. Show Answer Correct Answer: C) Battery, copper wire and iron nail. 2. For making electromagnets, soft iron is preferred over steel as it has high permeability and low retentivity A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. The primary origin(s) of magnetism lies in(a) Pauli exclusion principle.(b) polar nature of molecules.(c) intrinsic spin of electron.(d) None of these.Explaination:The primary origin of magnetism lies in the fact that the electrons are revolving and spinning about the nucleus of an atom. A) D. B) B. C) A. D) C. Show Answer Correct Answer: B) B. 4. Magnetic field lines form continuous closed loops A) Magnet is always a dipole. B) Magnet is always a monopole. C) Magnetic material is permeable. D) None of the above. Show Answer Correct Answer: A) Magnet is always a dipole. 5. The correct expression for the magnetic filed at a pint P on the axial point of a circular coil is A) $B=\\frac{\mu_oR^2}{2I\left(x^2+R^2\right)^{\frac{3}{2}}}$. B) $B=\\frac{\mu_oIR^2}{2\left(x^2+R^2\right)^{\frac{1}{2}}}$. C) $B=\\frac{\mu_oIR^2}{2\left(x^2+R^2\right)^{\frac{3}{2}}}$. D) $B=\\frac{\mu_oIR^2}{2\left(x^2-R^2\right)^{\frac{3}{2}}}$. Show Answer Correct Answer: C) $B=\\frac{\mu_oIR^2}{2\left(x^2+R^2\right)^{\frac{3}{2}}}$. 6. In a ..... a spinning turbine moves magnets which generates an electric current. A) Motor. B) Generator. C) All the above. D) None of the above. Show Answer Correct Answer: B) Generator. 7. What is the role of domain walls in the magnetization process of ferromagnetic materials? A) Domain walls are barriers that prevent the magnetization of ferromagnetic materials. B) Domain walls are regions where the magnetic moments of atoms are aligned in opposite directions. C) Domain walls are boundaries between magnetic domains where the magnetization direction changes. D) Domain walls are responsible for the color of ferromagnetic materials. Show Answer Correct Answer: C) Domain walls are boundaries between magnetic domains where the magnetization direction changes. 8. How does the shape of a magnet affect its magnetic field? A) The shape of a magnet affects its magnetic field by influencing the distribution and strength of the magnetic field lines. B) Magnet shape affects its weight, not its magnetic field strength. C) The shape of a magnet has no impact on its magnetic field. D) A magnet's shape determines its color, not its magnetic field. Show Answer Correct Answer: A) The shape of a magnet affects its magnetic field by influencing the distribution and strength of the magnetic field lines. 9. The Time period of freely suspended bar magnet is independent of A) Length of the suspension. B) Length of bar magnet. C) Moment of inertia of the bar magnet. D) Horizontal component of earth's magnetic field. Show Answer Correct Answer: A) Length of the suspension. 10. A magnet of length 2d and pole strength m is equally divided into two parts perpendicular to its length. What is the magnetic moment of each part? A) Double of the total magnetic moment. B) Half of the total magnetic moment. C) One-fourth of the total magnetic moment. D) Equal to the total magnetic moment. Show Answer Correct Answer: C) One-fourth of the total magnetic moment. 11. The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10$^{6}$V/m. What is the potential difference between the plates? A) Not solvable! because capacitor has no potential difference because it should have an insulator in between. B) 1.00x10$^{4}$V. C) 1.00x10$^{-4P}$. D) 2.00x10$^{4}$V. E) 1.75x10$^{4 P.D.}$. Show Answer Correct Answer: B) 1.00x10$^{4}$V. 12. At magnetic poles, the angle of dip is A) 45$^\circ$. B) 90$^\circ$. C) 0$^\circ$. D) 30$^\circ$. Show Answer Correct Answer: B) 90$^\circ$. 13. The value of the magnetic susceptibility for a super-conductors is:- A) -1. B) Infinity. C) +1. D) Zero. Show Answer Correct Answer: A) -1. 14. In terms of magnetic properties due to electrons, neon (A=10) may be described as ..... A) Diamagnetic. B) Electromagnetic. C) Ferromagnetic. D) Paramagnetic. Show Answer Correct Answer: A) Diamagnetic. 15. If a magnetic substance is kept in a magnetic field, then which of the following substance moves out of the magnetic field? A) Diamagnetic substance. B) Paramagnetic substance. C) Ferromagnetic substance. D) Both diamagnetic & paramagnetic substance. Show Answer Correct Answer: A) Diamagnetic substance. 16. What is the property of a material that allows it to create a permanent magnet? A) Ferromagnetism. B) Thermoelectricity. C) Diamagnetism. D) Paramagnetism. Show Answer Correct Answer: A) Ferromagnetism. 17. This type of electricity is known as current electricity. A) Human Harnessed Electricity. B) Naturally Occurring Electricity. C) Static Electricity. D) None of the above. Show Answer Correct Answer: A) Human Harnessed Electricity. 18. Substances that retain their ferromagnetic property for long period of time are called A) Electromagnet. B) Permanent magnet. C) Temporary magnet. D) None of above. Show Answer Correct Answer: B) Permanent magnet. 19. A superconductor exhibits perfect diamagnetism. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. In a moving coil galvanometer, the radial magnetic field will always exert a maximum torque on the coil. In which orientation will the coil have the maximum torque? A) Magnetic field is parallel to the plane of the coil. B) Magnetic field is at 45$^\circ$ with the plane of the coil. C) Magnetic field is perpendicular to the plane of the coil. D) Magnetic field is at 60$^\circ$ with the plane of the coil. Show Answer Correct Answer: A) Magnetic field is parallel to the plane of the coil. 21. What are some common applications of magnetic materials? A) Solar panels. B) Wind turbines. C) Common applications of magnetic materials include electric motors, transformers, magnetic storage devices, MRI machines, and magnetic sensors. D) Batteries. Show Answer Correct Answer: C) Common applications of magnetic materials include electric motors, transformers, magnetic storage devices, MRI machines, and magnetic sensors. 22. A generator is a device which converts electrical energy into mechanical energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. Soft iron retains magnetism once magnetic field is switched off. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 24. The value of angle of dip is zero at the magnetic equator because on it A) V and H are equal. B) V and H are zero. C) V is zero. D) H is zero. Show Answer Correct Answer: C) V is zero. 25. The susceptibility of a paramagnetic material is inversely proportional to absolute temperature. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 26. Bob made an electromagnet but it was very weak. How can he make it stronger? A) Take away a battery. B) Use less winds. C) Wrap the wire loosely. D) Use thicker wire. Show Answer Correct Answer: D) Use thicker wire. 27. Give an example of a material that does NOT stick to a magnet. A) Sawdust. B) Iron. C) Nickel. D) Steel. Show Answer Correct Answer: A) Sawdust. 28. Angle of dip maximum at A) Pole. B) Equator. C) Both (a) & (b). D) Neither (a) nor (b). Show Answer Correct Answer: A) Pole. 29. The magnetic moment of a current carrying circular loop is M. If current passing through the loop is doubled keeping the radius unchanged, the magnetic moment will become: A) 2M. B) M/2. C) M. D) M/4. Show Answer Correct Answer: A) 2M. 30. The capacitance of a parallel-plate capacitor can be increased by increasing which of the following? A) The distance between the plates. B) The charge on each plate. C) The area of the plates. D) The potential difference across the plates. E) None of the above. Show Answer Correct Answer: C) The area of the plates. 31. The angle between magnetic axis and geographic axis of earth is A) 10$^\circ$. B) 11$^\circ$. C) 90$^\circ$. D) 11.3$^\circ$. Show Answer Correct Answer: D) 11.3$^\circ$. 32. Odor:Chemical or Physical Property A) Chemical Property. B) Physical Property. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Property. 33. If relative permeability is 0.1, then nature of material is A) Diamagnetic. B) Paramagnetic. C) Ferromagnetic. D) None of above. Show Answer Correct Answer: A) Diamagnetic. 34. Magnetic field lines emerge from the north pole and merge at the south pole. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator is A) Positive, negative or zero. B) Unbounded. C) Always negative. D) Always zero. Show Answer Correct Answer: A) Positive, negative or zero. 36. A 9.0-V battery is connected between two parallel metal plates 4.0 mm apart. What is the magnitude of the electric field between the plates? A) 0.75 x 10$^{-6}$ N/C. B) 2.3 x 10$^{3}$ N/C. C) 9.0 N/C. D) 2.3 N/C. Show Answer Correct Answer: B) 2.3 x 10$^{3}$ N/C. 37. At a certain place on earth, BH = 1/ROOT 3 BV angle of dip at this place is A) 90. B) 60. C) 30. D) 45. Show Answer Correct Answer: B) 60. 38. What will happen to magnetising field intensity if intensity of magnetisation increases A) Decreases. B) Increases. C) No change. D) None of above. Show Answer Correct Answer: A) Decreases. 39. Connecting capacitors in parallel effectively causes the ..... ..... A) Plate area increase. B) Distance between the plates, increase. C) Plate area decrease. D) Distance between the plates, decrease. Show Answer Correct Answer: A) Plate area increase. 40. The relation between geometric length (L) and magnetic length (Lm) is: A) Lm = 5/6 Lg. B) Lm = 6/5 Lg. C) Lm = Lg. D) Lm = 2Lg. Show Answer Correct Answer: A) Lm = 5/6 Lg. 41. Where is field strength the strongest in a current carrying wire? A) Closest to the wire. B) Further from the wire. C) The same no matter the distance. D) None of the above. Show Answer Correct Answer: A) Closest to the wire. 42. A magnetic dipole moment is a vector quantity directed from A) North to south. B) East to west. C) South to north. D) West to east. Show Answer Correct Answer: C) South to north. 43. The magnetic needle is kept in a uniform magnetic field. It experiences A) A torque but not a force. B) Neither a force nor a torque. C) A force and a torque. D) A force but not a torque. Show Answer Correct Answer: A) A torque but not a force. 44. The capacitance of a parallel-plate capacitor can be increased by: A) Increasing the plate separation. B) Decreasing the charge. C) Decreasing the plate separation. D) Increasing the charge. Show Answer Correct Answer: C) Decreasing the plate separation. 45. Name one material that is magnetic. A) Cotton. B) Glass. C) Iron. D) Aluminum. Show Answer Correct Answer: C) Iron. 46. The great circle on the Earth perpendicular to the magnetic axis is called: A) Geographic equator. B) Magnetic equator. C) Geographic Meridian. D) Magnetic meridian. Show Answer Correct Answer: B) Magnetic equator. 47. What is the difference between a solenoid and a toroid? A) A solenoid is used for AC current, while a toroid is used for DC current. B) A solenoid has a uniform magnetic field, while a toroid has a variable magnetic field. C) A solenoid is a straight coil, while a toroid is a circular coil. D) A solenoid is a circular coil, while a toroid is a straight coil. Show Answer Correct Answer: C) A solenoid is a straight coil, while a toroid is a circular coil. 48. Electric field at a point varies as r$^\circ$ for- A) A line charge of infinite length. B) A plane infinite sheet of charge. C) An electric dipole. D) A point charge. Show Answer Correct Answer: B) A plane infinite sheet of charge. 49. Soft iron is used in transformer cores A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 50. The angle of dip at a certain place where the horizontal and vertical components of the earth's magnetic field are equal is A) 45$^\circ$. B) 60$^\circ$. C) 75$^\circ$. D) 30$^\circ$. Show Answer Correct Answer: A) 45$^\circ$. 51. If a transformer reduces voltage, it is called a ..... transformer. A) Step right. B) Step left. C) Step up. D) Step down. Show Answer Correct Answer: D) Step down. 52. According to the dynamo effect, A) Magnetism of the Earth is due to the presence of magnetic material at its centre. B) Magnetism of the Earth is due to the ionisation of gases in the Earth's atmosphere. C) Magnetism of the Earth is due to electrical currents produced by convection motion of metallic fluids. D) Magnetism of the Earth is due to the rotation of Earth around the Sun. Show Answer Correct Answer: C) Magnetism of the Earth is due to electrical currents produced by convection motion of metallic fluids. 53. The area of M-H loop for soft iron, as compared to that for steel is:- A) Zero. B) Less. C) Equal. D) More. Show Answer Correct Answer: B) Less. 54. Which of the following is correct about a magnetic monopole? A) Magnetic monopole exists. B) Magnetic monopole has constant value of monopole momentum. C) Magnetic monopole does not exist. D) The monopole momentum increases due to increase at its distance from the field. Show Answer Correct Answer: C) Magnetic monopole does not exist. 55. How does temperature affect the magnetism of materials? A) Temperature has no effect on magnetism. B) Temperature affects magnetism by decreasing it in ferromagnetic materials as it increases, and enhancing it in some materials at low temperatures. C) Magnetism is only affected by pressure, not temperature. D) Higher temperatures always increase magnetism in all materials. Show Answer Correct Answer: B) Temperature affects magnetism by decreasing it in ferromagnetic materials as it increases, and enhancing it in some materials at low temperatures. 56. How do electromagnets differ from permanent magnets? A) Permanent magnets can be turned on and off like electromagnets. B) Electromagnets can be turned on and off, while permanent magnets have a constant magnetic field. C) Electromagnets are made of permanent materials, while permanent magnets are not. D) Electromagnets are always stronger than permanent magnets. Show Answer Correct Answer: B) Electromagnets can be turned on and off, while permanent magnets have a constant magnetic field. 57. S.I. unit of flux is: A) Ohm. B) Weber. C) Tesla. D) None. Show Answer Correct Answer: B) Weber. 58. Name the property of substance which shows how easily the substance can be magnetised when placed in the magnetising field A) Magnetising force. B) Intensity of magnetisation. C) Magnetic permeability. D) Magnetic susceptibilty. Show Answer Correct Answer: D) Magnetic susceptibilty. 59. A magnet is the strongest at its ..... A) Poles. B) Surface. C) Middle. D) Sides. Show Answer Correct Answer: A) Poles. 60. The relative permeability of free space is A) Zero. B) One. C) Infinite. D) None of these. Show Answer Correct Answer: B) One. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Physics (Part I) Chapter 5 Magnetism And Matter Quiz 1Class 12 Physics (Part I) Chapter 5 Magnetism And Matter Quiz 2Class 12 Physics (Part I) Chapter 5 Magnetism And Matter Quiz 4Class 12 Physics (Part I) Chapter 1 Electric Charges And Fields QuizClass 12 Physics (Part I) Chapter 2 Electrostatic Potential And Capacitance QuizClass 12 Physics (Part I) Chapter 3 Current Electricity QuizClass 12 Physics (Part I) Chapter 4 Moving Charges And Magnetism QuizClass 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books