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 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Name two safety measures commonly used in electric circuits and appliances. A) Grounding and fuses. B) Resistance and conductance. C) Overloading and short circuits. D) Insulation and fuses. Show Answer Correct Answer: A) Grounding and fuses. 2. What happens to the magnetic field strength as you move away from a current-carrying wire? A) It remains constant. B) It fluctuates. C) It decreases. D) It increases. Show Answer Correct Answer: C) It decreases. 3. What is the direction of force on a current carrying conductor in a magnetic field? A) Parallel to the conductor. B) Perpendicular to the conductor. C) Opposite to the direction of current. D) In the same direction as the magnetic field. Show Answer Correct Answer: B) Perpendicular to the conductor. 4. Magnetic field lines in a bar Magnet are A) Interest each other. B) Closed curves. C) Originate from South pole. D) None of the above. Show Answer Correct Answer: B) Closed curves. 5. It was accidentally discovered that a compass needle got deflected when magnetic field passed through a metallic wire placed nearby. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 6. The magnetic field lines inside the current-carrying solenoid are A) Circles. B) Spirals. C) Parallel to the axis of solenoid. D) Perpendicular to the axis of solenoid. Show Answer Correct Answer: C) Parallel to the axis of solenoid. 7. The force is maximum when diection of current is at ..... to the direction of magnetic field A) Parallel. B) Perpendicular. C) 180 degree. D) Same direction. Show Answer Correct Answer: B) Perpendicular. 8. A charge + Qis moving upwards vertically. It enters a magnetic field directed to the north. The force on the charge will be towards A) South. B) East. C) West. D) North. Show Answer Correct Answer: C) West. 9. How does the magnetic field change as you move along the length inside a long solenoid carrying current? A) Decreases. B) Increases. C) Remains the same. D) Slightly increases. Show Answer Correct Answer: C) Remains the same. 10. A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act A) Vertically upwards. B) Towards east. C) Vertically downwards. D) Towards north. Show Answer Correct Answer: C) Vertically downwards. 11. The ends of compass needle point approximately towards ..... and ..... directions A) North, south. B) East, west. C) North, west. D) None of the above. Show Answer Correct Answer: A) North, south. 12. The direction of magnetic field developed around a current-carrying conductor can be easily found by the use of A) Right hand thumb rule. B) Left hand thumb rule. C) Fleming's left hand rule. D) Fleming's right hand rule. Show Answer Correct Answer: A) Right hand thumb rule. 13. Hans Christian Oersted, one of the leading scientists of the 19th century, played a crucial role in understanding A) Magnetism. B) Electricity. C) Electromagnetism. D) None. Show Answer Correct Answer: C) Electromagnetism. 14. Which rule states the relationship between the direction of current and the direction of magnetic field A) Right Hand Thumb Rule. B) Fleming's Right hand thumb rule. C) Fleming's left hand thumb rule. D) Amperes swimming rule. Show Answer Correct Answer: A) Right Hand Thumb Rule. 15. What is the direction of magnetic field lines outside a magnet? A) They intersect each other. B) From North pole to South pole. C) From South pole to North pole. D) They do not have a specific direction. Show Answer Correct Answer: B) From North pole to South pole. 16. A charged particle moving in a magnetic field experiences a resultant force A) In the direction perpendicular to both the field and its velocity. B) In the direction opposite to that field. C) In the direction of field. D) None of these. Show Answer Correct Answer: A) In the direction perpendicular to both the field and its velocity. 17. What is the effect of reversing the direction of current in a wire on the magnetic field? A) The direction of the magnetic field reverses. B) The magnetic field remains unchanged. C) The magnetic field disappears. D) The strength of the magnetic field increases. Show Answer Correct Answer: A) The direction of the magnetic field reverses. 18. Which one is not a devices that use current-carrying conductor and magnetic fields A) Electric generator,. B) Electric Heater. C) Electric motor,. D) Loudspeakers,. Show Answer Correct Answer: B) Electric Heater. 19. By which instrument, the presence of magnetic field be determined A) Voltmeter. B) Magnetic needle. C) Galvanometer. D) Diameter. Show Answer Correct Answer: B) Magnetic needle. 20. What do the lines of a magnetic field represent? A) The path of electric current. B) The direction of magnetic force. C) The strength of the electric field. D) The flow of electrons. Show Answer Correct Answer: B) The direction of magnetic force. 21. Electric motor converts A) Electrical energy to mechanical energy. B) Mechanical energy to electrical energy. C) Electrical energy to light energy. D) Heat energy to electrical energy. Show Answer Correct Answer: A) Electrical energy to mechanical energy. 22. A freely suspended bar magnet always rest in N-S direction A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. The direction of force o the conductor depends on the A) Direction of current and diection of magnetic field. B) Dirction of field and amount of current. C) Heat and direction of current. D) Heat and direction of magnetis field. Show Answer Correct Answer: A) Direction of current and diection of magnetic field. 24. Inside the magnet, the direction of field lines is from its A) North to south. B) South to north. C) Mag. field do not move inside a magnet. D) None. Show Answer Correct Answer: B) South to north. 25. Which device produces the electric current? A) Galvanometer. B) Generator. C) Ammeter. D) Motor. Show Answer Correct Answer: B) Generator. 26. The magnetic field lines: A) Cross at 60$^{0}$ to each other. B) Intersect at 90$^{0}$ to each other. C) Intersect at 45$^{0 }$to each other. D) Do not cross one another. Show Answer Correct Answer: D) Do not cross one another. 27. If the magnetic field produced by one turn of a coil is 12T, what is the magnetic field produced when there are 6 turns? A) 72 T. B) 12 T. C) 2 T. D) 6 T. Show Answer Correct Answer: A) 72 T. 28. Why does a compass needle get deflected when brought near a bar magnet? A) The compass needle gets deflected when brought near a bar magnet due to the interaction between the magnetic fields. B) The compass needle gets deflected due to gravity. C) The compass needle gets deflected due to static electricity. D) The compass needle gets deflected due to temperature changes. Show Answer Correct Answer: A) The compass needle gets deflected when brought near a bar magnet due to the interaction between the magnetic fields. 29. Closure the field lines ..... the magnetic strength A) Weaker. B) Stronger. C) Lower. D) None of the above. Show Answer Correct Answer: B) Stronger. 30. If there are circular coil having n turns then the field produces is A) Field strength is proportional to the radius of the coil. B) Field strength is inversely proportional to the number of turns (n). C) N times as large as that produced in single turn. D) Field strength is not affected by the number of turns (n). Show Answer Correct Answer: C) N times as large as that produced in single turn. 31. What is the purpose of a commutator in an electric motor? A) To control the temperature of the motor. B) To increase the speed of the motor. C) To reverse the direction of flow of electric current. D) To decrease the speed of the motor. Show Answer Correct Answer: C) To reverse the direction of flow of electric current. 32. Overloading is due to A) Insulation of wire is damaged. B) Fault in the appliances. C) Accidental hike in supply voltage. D) All of the above. Show Answer Correct Answer: D) All of the above. 33. What is the polarity of a current carrying loop if the current is flowing in an anti-clockwise direction? A) North pole. B) South pole. C) No pole. D) Both north and south poles. Show Answer Correct Answer: A) North pole. 34. In which of the following devices DC motor is used? A) Fans. B) Refrigerator. C) Battery-operated toy. D) Washing machine. Show Answer Correct Answer: C) Battery-operated toy. 35. What is the pattern of magnetic field lines around a circular loop of wire? A) Concentric circles. B) No pattern. C) Radial lines. D) Straight lines. Show Answer Correct Answer: A) Concentric circles. 36. A plotting compass is placed near South pole of a bar magnet. The pointer of the platting compass will? A) Point away from the South pole. B) Point parallel from the South pole. C) Point towards the South pole. D) Point at right angles to the South pole. Show Answer Correct Answer: C) Point towards the South pole. 37. The magnetic field lines near a long straight wire carrying current are: A) Straight lines. B) Spiral lines. C) Radial lines. D) Concentric rings. Show Answer Correct Answer: D) Concentric rings. 38. The greater the number of windings (the number of times it is wrapped around) in an electromagnet's coil A) The slower the compass needle moves to the wire. B) The less the magnet will pick up. C) The more current it takes to create the electromagnet. D) The stronger the magnet is. Show Answer Correct Answer: D) The stronger the magnet is. 39. Which of the following is a non magnetic substance A) Cobalt. B) Nickel. C) Brass. D) Iron. Show Answer Correct Answer: A) Cobalt. 40. Magnetic field inside a long solenoid carrying current is A) Same at all points (uniform). B) Different at poles and at the centre. C) Zero. D) Different at all points. Show Answer Correct Answer: A) Same at all points (uniform). 41. Three resistors of 2.5 $\Omega$, 12 $\Omega$ and 3.5 $\Omega$ are connected in series. Which of the given single resistors can replace the three of them in a circuit? A) 16 oh. B) 8 oh. C) 4 oh. D) 18 $\Omega$. Show Answer Correct Answer: D) 18 $\Omega$. 42. Relative strength of magnetic field at a point in the space surrounding the magnet is shown by the A) Length of magnet. B) Resistance offered by the surroundings. C) Degree of closeness of the field. D) Thickness of magnet. Show Answer Correct Answer: C) Degree of closeness of the field. 43. What is that instrument which can detect the presence of electric current in a circuit? A) Galvanometer. B) Motor. C) Generator. D) None of above. Show Answer Correct Answer: A) Galvanometer. 44. A current carrying solenoid coil used to make A) Magnets. B) Electromagnets. C) Soft iron. D) None of the above. Show Answer Correct Answer: B) Electromagnets. 45. Imagine that you are holding a current-carrying straight conductor in your right hand such that the A) Thumb points towards the direction of magnetic lines of force. B) Thumb points towards the direction of current. C) The magnetic field lines are closed curves. D) Fingers will wrap around the conductor in the direction of the field of electric current. Show Answer Correct Answer: B) Thumb points towards the direction of current. 46. Which of the following is NOT a use of magnets? A) In refrigerators. B) In radio and stereo speakers. C) In audio and video cassette players. D) In mobile phones. Show Answer Correct Answer: D) In mobile phones. 47. To convert an AC generator into DC generator A) Split-ring type commutator must be used. B) Slip rings and brushes must be used. C) A stronger magnetic field has to be used. D) A rectangular wire loop has to be used. Show Answer Correct Answer: A) Split-ring type commutator must be used. 48. According to Fleming's left-hand rule, what does the thumb represent? A) Direction of voltage. B) Direction of force. C) Direction of current. D) Direction of the magnetic field. Show Answer Correct Answer: B) Direction of force. 49. Which word means how hard it is for electrons to flow? A) Resistance. B) Power. C) Voltage. D) Current. Show Answer Correct Answer: A) Resistance. 50. You are given four bulbs of 25 W, 40 W, 50 W and 60 W. Which bulb has the lowest resistance? A) 40 W. B) 50 W. C) 25 w. D) 60 W. Show Answer Correct Answer: D) 60 W. 51. A compass needle gets deflected whenbrought near a bar magnet. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 52. An induced emf is produced when a magnet is moved into a coil. The magnitude of induced emf does not depend on A) The number of turns of the coil. B) The resistivity of the wire of the coil. C) The strength of the magnet. D) The speed with which the magnet is moved. Show Answer Correct Answer: B) The resistivity of the wire of the coil. 53. NO two field lines are found to cross each other.if they did ..... A) It would mean that outside the point of intersection the compass needle point towards to directions. B) The like poles will attract each other. C) The unlike poles would repel. D) None of these. Show Answer Correct Answer: D) None of these. 54. A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid: A) Will decrease. B) Will increase. C) Will become zero. D) Will remain the same. Show Answer Correct Answer: B) Will increase. 55. What does the right-hand thumb rule help to determine? A) The direction of the magnetic field. B) The amount of current flowing. C) The resistance of the wire. D) The strength of the magnetic field. Show Answer Correct Answer: A) The direction of the magnetic field. 56. Which of the following is true about magnetic field lines? A) They intersect each other. B) They are parallel to each other. C) They form closed curves. D) They have no specific shape. Show Answer Correct Answer: C) They form closed curves. 57. According to Fleming's left hand rule, what does the forefinger point towards? A) Motion. B) Force. C) Magnetic field. D) Current. Show Answer Correct Answer: C) Magnetic field. 58. Henry oxford accidentally discovered that a compass needle got deflected when an electric current passed through a metallic wire placed nearby. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 59. The device used for producing electric current is A) Amounted. B) Galvanometer. C) Motor. D) Generator. Show Answer Correct Answer: D) Generator. 60. Right hand thumb rule help us to find the direction of ..... in a current carrying conductor A) Electric field. B) Magnetic field. C) None of these. D) None of the above. Show Answer Correct Answer: B) Magnetic field. ← 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 4Class 10 Science Chapter 13 Magnetic Effects Of Electric Current Quiz 5 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books