This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Magnetic Effects Of Electric Current > Class 10 Science Chapter 13 Magnetic Effects Of Electric Current – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Two parallel conductors A and B of equal lengths carry currents I and 10I respectively in the same direction. Then A) A and B repel each other with same force. B) A and B attract each other with same force. C) A will attract B, but B will repel A. D) A and B attract each other with different face. Show Answer Correct Answer: B) A and B attract each other with same force. 2. We can induce current in the coil by- A) Moving it in a magnetic field. B) Changing magnetic field around it. C) Option A and B both. D) None of the above. Show Answer Correct Answer: C) Option A and B both. 3. Magnetic field is a scalar quantity. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. The main advantage of A.C power transmission over D.C power transmission over' long distance is A) Less insulation problem. B) Easy transformation. C) Less problem of instability. D) AC transmit without much loss of energy. Show Answer Correct Answer: D) AC transmit without much loss of energy. 5. The function of commutator or slip ring is to A) Change the direction of current through coil. B) Increase the current flowing through the coil. C) Change the direction of magnetic field. D) Decrease the current flowing through the coil. Show Answer Correct Answer: A) Change the direction of current through coil. 6. What is the principle behind an electric generator? A) Conversion of heat energy to electrical energy. B) Conversion of electrical energy to mechanical energy. C) Conversion of mechanical energy to electrical energy. D) Conversion of electrical energy to heat energy. Show Answer Correct Answer: C) Conversion of mechanical energy to electrical energy. 7. The magnetic field produced by a given current in the conductor ..... as the distance from it increases. A) Decreases. B) Increases. C) Remains same. D) None. Show Answer Correct Answer: A) Decreases. 8. Weak ion currents that travel along nerve cell in our body produces ..... A) Magnetic Field. B) Electrons. C) Magnetism. D) Electricity. Show Answer Correct Answer: A) Magnetic Field. 9. An Electric charge in a uniform motion produces A) An Electric Field only. B) An Magnetic field only. C) Both Electric Field & Magnetic field. D) Neither of them. Show Answer Correct Answer: C) Both Electric Field & Magnetic field. 10. A ship is to reach a place 8 degree south of west. In what direction should the ship be steered, if declination at the place is 18 degrees west? A) East of magnetic north at angle 64 degrees. B) West of magnetic north at angle 64 degrees. C) We don't know brother. D) West of magnetic south at angle 50 degree. E) East of magnetic south at angle 18 degree. Show Answer Correct Answer: B) West of magnetic north at angle 64 degrees. 11. Which of the following is not the source of magnetic field: A) Moving charge. B) Electric current. C) Magnet. D) A small piece of iron. Show Answer Correct Answer: D) A small piece of iron. 12. A heating producing device should be used in an electric circuit. This device should have A) High resistance and low melting point. B) Low resistance and high melting point. C) High resistance and high melting point. D) Low resistance and low melting point. Show Answer Correct Answer: B) Low resistance and high melting point. 13. The soft Iron core, on which the coil is wound, plus the coils, is called A) A coil. B) A motor. C) A generator. D) An Armature. Show Answer Correct Answer: D) An Armature. 14. The region surrounding a magnet, in which the force of the magnet can be detected, is said to have a ..... A) Magnetic field. B) Electric field. C) Gravitational field. D) Both electric and magnetic field. Show Answer Correct Answer: A) Magnetic field. 15. If a long copper rod carries a direct current, the magnetic field associated with the current will be A) Only inside the rod. B) Only outside the rod. C) Both inside and outside the rod. D) Neither inside nor outside the rod. Show Answer Correct Answer: C) Both inside and outside the rod. 16. Earth wire carries A) Current. B) Voltage. C) No current. D) None of the above. Show Answer Correct Answer: C) No current. 17. Who discovered Magnetic Effect of Current: A) Oasted. B) Newton. C) Faraday. D) Fleming. Show Answer Correct Answer: A) Oasted. 18. What is a solenoid? A) A coil of wire that produces a magnetic field. B) A type of electric fuse. C) A device to measure current. D) A type of magnet. Show Answer Correct Answer: A) A coil of wire that produces a magnetic field. 19. What is the unit of magnetic field strength named after Hans Christian Oersted? A) Tesla. B) Oasted. C) Ampere. D) Volt. Show Answer Correct Answer: B) Oasted. 20. Which of the following increases the turning speed of a simple D.C. motor?(i) An increase in the number of turns of the coil(ii) An increase in the input of D.C. voltage(iii) The inserting of a copper core in the coil A) Only (i) and (ii). B) Only (i) and (iii). C) Only (ii) and (iii). D) (i), (ii) and (iii). Show Answer Correct Answer: A) Only (i) and (ii). 21. The magnetic field lines always begin from A) N-pole and end on S-pole. B) S-pole and end on N-pole. C) Start from the middle and end at N-pole. D) Start from the middle and end at S-pole. Show Answer Correct Answer: A) N-pole and end on S-pole. 22. Commercial electric motors do not use A) An electromagnet to rotate the armature. B) A soft iron core on which the coil is wound. C) Effectively large number of turns of conducting wire in the current carrying coil. D) A permanent magnet to rotate the armature. Show Answer Correct Answer: D) A permanent magnet to rotate the armature. 23. Material of the core of a strong magnet is A) Soft iron. B) Steel. C) Aluminium. D) Copper. Show Answer Correct Answer: A) Soft iron. 24. Magnetic field lines will- A) Never cut each other. B) Subtend right angle with respect to each other. C) Bisect each other. D) Cut each other. Show Answer Correct Answer: A) Never cut each other. 25. The direction of induced current is given by A) Fleming's left hand rule. B) Fleming's right hand rule. C) Right hand thumb rule. D) Left hand thumb rule. Show Answer Correct Answer: B) Fleming's right hand rule. 26. Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field? A) To the right side. B) To the left side. C) Towards the front wall. D) Towards the back wall. Show Answer Correct Answer: A) To the right side. 27. According to right hand thumb rule, the fingers which are wrapping the current carrying conductor give you the direction of ..... A) Direction of current. B) Direction of magnetic field. C) None of these. D) None of the above. Show Answer Correct Answer: B) Direction of magnetic field. 28. What is wrong about an electromagnet? A) Electromagnets can made of steel. B) Electromagnets can be easily demagnetised. C) An electromagnet produces a strong magnetic field. D) Electromagnets show temporary magnetism. Show Answer Correct Answer: A) Electromagnets can made of steel. 29. The pattern of the magnetic field produced by the straight current carrying conductor is A) In the direction opposite to the current. B) In the direction parallel to the wire. C) Circular around the wire. D) In the same direction of current. Show Answer Correct Answer: C) Circular around the wire. 30. What are the two different standards of circuits used A) 20 and 15 A. B) 220Aand 110A. C) 15 AD 5 A. D) 240 ADE 220 A. Show Answer Correct Answer: C) 15 AD 5 A. 31. Which of the following factors affect the strength of force experience by a current carrying conductor in a uniform magnetic field? A) Magnetic field strength. B) Magnitude of current in a conductor. C) Length of the conductor within magnetic field. D) All of the above. Show Answer Correct Answer: D) All of the above. 32. The best material to make permanenet magnets is A) Copper. B) Alnico. C) Soft iron. D) Aluminium. Show Answer Correct Answer: B) Alnico. 33. Parallel and equidistant magnetic field lines represent A) The direction of magnetic field. B) A uniform magnetic field. C) Magnetic intensity. D) Strength of magnetic field. Show Answer Correct Answer: B) A uniform magnetic field. 34. If the direction of direction of electric current in a solenoid when viewed from a particular end is anticlockwise, then this end of solenoid will be A) West pole. B) East pole. C) North pole. D) South pole. Show Answer Correct Answer: C) North pole. 35. Do the filed lines cross each other? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 36. Name one factor that does not affect the size of a force in on a current-carrying conductor placed in a magnetic field? A) Size of the current. B) Magnetic flux density/size of magnetic field. C) Gravity. D) Length of the conductor. Show Answer Correct Answer: C) Gravity. 37. Which of the following correctly describes the magnetic field near a long straight wire? A) The field consists of concentric circles centred on the wire. B) The field consists of straight lines parallel to the wire. C) The field consists of straight lines perpendicular to the wire. D) The field consists of radial lines originating from the wire. Show Answer Correct Answer: C) The field consists of straight lines perpendicular to the wire. 38. Name the device which converts electric energy into mechanical energy A) Generator. B) Transformer. C) Motor. D) Heater. Show Answer Correct Answer: C) Motor. 39. Magnetic lines of force inside current carrying solenoid are A) Perpendicular to axis. B) Along the axis and are parallel to each other. C) Parallel inside the solenoid and circular at the ends. D) Circular. Show Answer Correct Answer: C) Parallel inside the solenoid and circular at the ends. 40. The direction of the magnetic field is taken to be the direction in which a ..... pole of the compass needle moves inside it. A) North. B) South. C) All the above. D) None of the above. Show Answer Correct Answer: A) North. 41. The factors on which one magnetic field strength produced by current carrying solenoid depends on A) Magnitude of current. B) Number of turns. C) Nature of core material. D) All of the above. Show Answer Correct Answer: D) All of the above. 42. What is the direction of the magnetic field lines around a current-carrying straight wire? A) Straight lines parallel to the wire. B) Radial lines originating from the wire. C) Concentric circles centered on the wire. D) Straight lines perpendicular to the wire. Show Answer Correct Answer: C) Concentric circles centered on the wire. 43. When current flows downwards, the direction of magnetic field is A) Clockwise. B) Anticlockwise. C) All the above. D) None of the above. Show Answer Correct Answer: A) Clockwise. 44. The process by which changing magnetic field in a conductor induces as a current in another conductor is called as- A) Electromagnetic conduction. B) Current induction. C) Electromagnetic induction. D) Electric induction. Show Answer Correct Answer: C) Electromagnetic induction. 45. A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is A) Upward. B) Towards south. C) Towards east. D) Downward. Show Answer Correct Answer: C) Towards east. 46. What is the unit of power? A) Watts. B) Volts. C) Amps. D) Ohms. Show Answer Correct Answer: A) Watts. 47. Direction of magnetic field produced by a current carrying loop can be found by using A) Fleming's Right hand rule. B) Clock Rule. C) Fleming's Left hand rule. D) Maxwell's corkscrew rule. Show Answer Correct Answer: B) Clock Rule. 48. Who discovered magnetic effects A) Newton. B) Orested. C) None. D) None of the above. Show Answer Correct Answer: B) Orested. 49. Which situations overloading can NOT occur in electrical circuits? A) Live wire and the neutral wire come into direct contact. B) By connecting too many appliances to a single socket. Overloading can occurs. C) By connecting heating devices in Lighting circuit. D) Suitable capacity of Conductors are used for proper electrical devices. Show Answer Correct Answer: D) Suitable capacity of Conductors are used for proper electrical devices. 50. If there is a circular coil having "n" turns, the field produced is A) "n$^{2}$" times as large as that produced by a single turn. B) "n$^{3}$" times as large as that produced by a single turn. C) "n" times as large as that produced by a single turn. D) "2n" times as large as that produced by a single turn. Show Answer Correct Answer: C) "n" times as large as that produced by a single turn. 51. What indicates that the magnetic field inside the solenoid is uniform A) Parallel straight lines. B) Current passing from north to south pole. C) Turning of the wire around the solenoid. D) Magnetic field around the solenoid in circular loop. Show Answer Correct Answer: A) Parallel straight lines. 52. Electric generator works on the principle of A) Magnetic effects of electric current. B) Electro magnetic induction. C) Heating effects of current. D) Conversion of energy to electricity. Show Answer Correct Answer: B) Electro magnetic induction. 53. A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then A) The wire will experience a perpendicular force. B) The wire will not experience any force. C) The wire will experience a force along the direction of the magnetic field. D) The wire will experience the torque. Show Answer Correct Answer: B) The wire will not experience any force. 54. The pattern of the magnetic field generated by a currentcarrying conductor depends on ..... A) Magnitude of Current. B) Geometry of Conductor. C) Material of Conductor. D) All of these. Show Answer Correct Answer: B) Geometry of Conductor. 55. What are the characteristics of magnetic field lines? A) Straight lines that connect the north and south poles directly. B) Continuous, closed loops that emerge from the north pole and enter the south pole, never intersecting each other. C) Lines that change direction randomly and do not follow a pattern. D) Discontinuous lines that intersect at random points. Show Answer Correct Answer: B) Continuous, closed loops that emerge from the north pole and enter the south pole, never intersecting each other. 56. In India we use AC in our households. How many times does it change its direction in one second? A) 220 times. B) 2 times. C) 50 times. D) 100 times. Show Answer Correct Answer: D) 100 times. 57. If a positively charged particle is moving towards east is deflected towards south by a magnetic field. The direction of the magnetic field will be ..... A) Upward. B) Towards west. C) Downward. D) Towards north. Show Answer Correct Answer: A) Upward. 58. According to right hand thumb rule the direction of magnetic field in a current carrying conductor is denoted by A) Curl finger. B) First finger. C) Middle finger. D) Thumb. Show Answer Correct Answer: A) Curl finger. 59. A compass needle is, in fact, a small ..... magnet. A) Circular. B) Cylindrical. C) Horse shoe. D) Bar. Show Answer Correct Answer: D) Bar. 60. Two parallel wires carry current in the same direction attract each other because of A) Magnetic forces between them. B) Potential difference between them. C) Electric forces between them. D) Mutual inductance between them. Show Answer Correct Answer: A) Magnetic forces between them. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 1Class 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 2Class 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 3Class 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 5 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books