This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Electric Current And Its Effects > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Electric Current and Its Effect A) It is a device that opens or closes an electric circuit. B) It is a device that measures electric current. C) It is a device that stores electric charge. D) It is a device that converts chemical energy into electrical energy. Show Answer Correct Answer: D) It is a device that converts chemical energy into electrical energy. 2. A material in which electrons are able to move easily A) Conductor. B) Insulator. C) Circuit. D) Resistance. Show Answer Correct Answer: A) Conductor. 3. Which effect of current is used in an electric fuse? A) Heating effect. B) Lightning effect. C) Flowing effect. D) Insulating effect. Show Answer Correct Answer: A) Heating effect. 4. The magnetic field inside a current-carrying solenoid is: A) Constant. B) Stronger at the center. C) Weaker at the center. D) Zero. Show Answer Correct Answer: B) Stronger at the center. 5. A circular coil of radius 5 cm and 50 turns carries a current of 3 ampere. The magnetic dipole moment of the coil is A) 0.5 amp-m2. B) 1.2 amp-m2. C) 1.0 amp-m2. D) 0.8 amp-m2. Show Answer Correct Answer: B) 1.2 amp-m2. 6. What is latitude? A) A measure of the distance away from the prime meridian. B) A measure of an angle in Math class. C) A measure of the distance away from the equator. D) A measure of how warm a climate is. Show Answer Correct Answer: C) A measure of the distance away from the equator. 7. What is the electrode to which negative ions move? A) Cathode. B) Conductor. C) Anode. D) Electrolyte. Show Answer Correct Answer: C) Anode. 8. Current is related to the drift velocity A) Current is directly proportional to the drift velocity. B) Current it depends on the the square of drift velocity. C) Current does not depend upon the drift velocity. D) Current is inversely proportional to drift velocity. Show Answer Correct Answer: A) Current is directly proportional to the drift velocity. 9. When too much electric current flows through an object, the object can heat up. What might this cause? A) A fire. B) Your computer will turn on. C) The circuit to open. D) Carry information from the brain. Show Answer Correct Answer: A) A fire. 10. What are incandescent bulbs? A) Bulbs with mercury vapour. B) Bulbs tungsten filament. C) Bulbs with light emitting diodes. D) None of the above. Show Answer Correct Answer: B) Bulbs tungsten filament. 11. A type of magnet that has temporary magnetic effect when electric current flows through it.This refer to A) Electric. B) Electromagnet. C) Electronic. D) Electrostatic. Show Answer Correct Answer: B) Electromagnet. 12. What are conductors and insulators? A) Conductors are used to control traffic, while insulators are used for soundproofing. B) Conductors are used in jewelry making, while insulators are used in gardening. C) Conductors are used in cooking, while insulators are used in construction. D) Conductors allow the flow of electric current, while insulators do not. Show Answer Correct Answer: D) Conductors allow the flow of electric current, while insulators do not. 13. Which one of the following elements is always required in an electric circuit? A) Ammeter. B) Voltmeter. C) Connecting wires. D) Switch. Show Answer Correct Answer: C) Connecting wires. 14. Which statement about vertebrates is true? A) Vertebrates have skeletons. B) Vertebrates live only on land. C) Most animals are vertebrates. D) Vertebrates do not have backbones. Show Answer Correct Answer: A) Vertebrates have skeletons. 15. Fuse works based on the A) Heating effect of electric current. B) Magnetic effect of electric current. C) Lighting effect of electric current. D) None of the above. Show Answer Correct Answer: A) Heating effect of electric current. 16. The hammer is attatched to the ..... which in turn strikes the ..... A) Electromagnet; Switch. B) Gong; Iron strip. C) Iron Strip; Gong. D) Switch; Iron Strip. Show Answer Correct Answer: C) Iron Strip; Gong. 17. The rate at which electric energy is dissipated or consumed in an electric circuit is caleed A) Electric Energy. B) Electric Resistance. C) Electric Power. D) Electric Potential. Show Answer Correct Answer: C) Electric Power. 18. Which is a better conductor of electricity? A) Electrolytes. B) Metals. C) Non metals. D) None of these. Show Answer Correct Answer: B) Metals. 19. A student is hiking on a summer day. She sees pieces of rock fall down a cliff. Which process MOST LIKELY occurred? A) Erosion by gravity. B) Deposition by wind. C) Erosion by water. D) Weathering by ice. Show Answer Correct Answer: A) Erosion by gravity. 20. Key or switch in circuit is placed A) Anywhere in the circuit. B) On the right side of the battery. C) On the left side of the battery. D) Near the positive terminal of the bulb. Show Answer Correct Answer: A) Anywhere in the circuit. 21. Which one of the following is the most energy efficient A) LED. B) Incandescent bulb. C) CFL. D) None of the above. Show Answer Correct Answer: A) LED. 22. Resistance is measured in ..... A) Volt. B) Amps. C) Ohms. D) Watts. Show Answer Correct Answer: C) Ohms. 23. The electrode connected to the negative terminal of a battery is known as A) Cathode. B) Electrolyte. C) Negative pole. D) Anode. Show Answer Correct Answer: A) Cathode. 24. Arrangement is used to increase the resistance in a circuit. A) Resistors connected in parallel. B) Resistors connected in series. C) Resistors connected in alternate. D) Resistors connected in combination. Show Answer Correct Answer: B) Resistors connected in series. 25. Electricity produces ..... effect A) Magnetic. B) Electric. C) Both. D) No. Show Answer Correct Answer: C) Both. 26. Electric ..... can travel long distances A) Voltages. B) Currents. C) Amperes. D) Circuits. Show Answer Correct Answer: B) Currents. 27. Which of the following devices does not work on heating effect of current? A) Electric bulb. B) Immersion rod. C) Fuse. D) Electric bell. Show Answer Correct Answer: D) Electric bell. 28. Why Nichrome is used for making wires of heating coils? A) 1.High melting point and low resistivity. B) 2.Low resistivity and high melting point. C) 3.High resistivity and high melting point. D) 4. It can get oxidised easily and have high melting point. Show Answer Correct Answer: C) 3.High resistivity and high melting point. 29. Conductors can allow electricity because of the presence of A) Free electrons. B) Free protons. C) Atoms. D) Free ions. Show Answer Correct Answer: A) Free electrons. 30. Electric circuit is a path for transmitting electric current A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 31. The electric heating is used in A) Fuse. B) Light. C) Heater. D) All of the above. Show Answer Correct Answer: D) All of the above. 32. Connection of more than one device/ appliance to a single socket is called- A) Overloading. B) Short circuit. C) Both. D) None of the above. Show Answer Correct Answer: A) Overloading. 33. The magnetic lines of force produced by a bar magnet: A) Originate from North pole and end at infinity. B) Originate from North pole and ends at its South pole. C) Originate from South pole and end at North pole. D) Originate from South pole and ends at its West pole. Show Answer Correct Answer: B) Originate from North pole and ends at its South pole. 34. An electric bulb is connected to a 220 V generator. The current is 2 A. What is the power of the bulb? A) 110 watt. B) 440 watt. C) 220 watt. D) 330 watt. Show Answer Correct Answer: B) 440 watt. 35. What is the role of the soft iron core in an electromagnet? A) Increases resistance. B) Decreases magnetic strength. C) Reduces the number of turns. D) Enhances the magnetic field. Show Answer Correct Answer: D) Enhances the magnetic field. 36. A galvanometer is a device which is used to: A) Detect the current in the circuit. B) Measure potential difference between two points. C) Measure emf of a cell. D) None of these. Show Answer Correct Answer: A) Detect the current in the circuit. 37. A region around a charged particle that can exert a force on another charged particle is called an A) Electric force. B) Electric field. C) Electric charge. D) Electric pulse. Show Answer Correct Answer: B) Electric field. 38. Fill in the blanks:In the symbol of electric cell, the ..... line represents the positive terminal and the thicker, ..... line represents negative. A) Long, longer. B) Shorter, longer. C) Short, shorter. D) Longer, shorter. Show Answer Correct Answer: D) Longer, shorter. 39. Name two factors that affect the chemical effects of electric current. A) Color of the electrodes and color of the electrolyte. B) Temperature and pressure. C) Nature of the electrodes and nature of the electrolyte. D) Size of the electrodes and size of the electrolyte. Show Answer Correct Answer: C) Nature of the electrodes and nature of the electrolyte. 40. A battery is used as a driving force in an electric circuit. True or false? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 41. The positive ion moves towards the A) Cation. B) Cathode. C) Diode. D) Anode. Show Answer Correct Answer: B) Cathode. 42. The breaking down of a substance into its component elements by passing an electric current through it is called ..... A) Thermal decomposition. B) Electrolysis. C) Electrical breakdown. D) None of the above. Show Answer Correct Answer: B) Electrolysis. 43. Electrical energy is produced at a ..... and then sent to a step up transformer to increase the voltage. A) Store. B) Power plant. C) Stadium. D) School. Show Answer Correct Answer: B) Power plant. 44. Two end of a magnet are called A) Magnet. B) Poles of magnet. C) All the above. D) None of the above. Show Answer Correct Answer: B) Poles of magnet. 45. Ultimate source of Energy for a living organism is A) River. B) Moon. C) Water. D) Sun. Show Answer Correct Answer: D) Sun. 46. The phenomenon of the induction of an electric current in a coil due to a change in magnetic field is known as: A) Electromagnetic induction. B) Faraday's induction. C) Electric induction. D) Magnetic induction. Show Answer Correct Answer: A) Electromagnetic induction. 47. Milk is a ..... conductor. A) Good. B) Bad. C) All the above. D) None of the above. Show Answer Correct Answer: A) Good. 48. Wires made from some special materials melt quickly and break when a large electric current passes through it.these wires are used to make A) A&B. B) Electric fuses. C) Electromagnet. D) Fuses. Show Answer Correct Answer: B) Electric fuses. 49. . 6.The intensity of magnetic field between the poles of an electromagnet would be unchanged, if: A) Distance between the poles of electromagnet is halved. B) Direction of current in the electromagnet coil is reversed. C) Current in the electromagnet coil is doubled. D) Material of its core is changed. Show Answer Correct Answer: B) Direction of current in the electromagnet coil is reversed. 50. The magnetic field inside a solenoid carrying current is almost: A) Non-uniform. B) Uniform. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: B) Uniform. 51. Which of the following correctly describes the magnetic field near a straight wire carrying current: A) The field is uniform. B) The field is non-uniform. C) The field consists of concentric circles centered on the wire. D) None of these. Show Answer Correct Answer: C) The field consists of concentric circles centered on the wire. 52. The strength of the magnetic field produced by a current-carrying conductor depends on: A) Length of the conductor. B) Type of material. C) Current flowing through the conductor. D) All of the above. Show Answer Correct Answer: D) All of the above. 53. In a bulb there is a thin wire called A) Coil. B) Element. C) Filament. D) Fuse. Show Answer Correct Answer: C) Filament. 54. The filament of an electric bulb is made of: A) Tungsten. B) Copper. C) Iron. D) Aluminum. Show Answer Correct Answer: A) Tungsten. 55. What do you call a device that produces an electric current when a coil of wire is wrapped around an iron core and rotated near a magnet? A) Generator. B) Car. C) Magnet. D) Motor. Show Answer Correct Answer: A) Generator. 56. What are the three basic parts of an electric motor? A) Commutator, stator, and rotor. B) Armature, brushes, and battery. C) Commutator, armature, and brushes. D) Battery, armature, and DC power supply. Show Answer Correct Answer: A) Commutator, stator, and rotor. 57. Substances that do not conduct electricity are called ..... A) Conductors. B) Insulators. C) Non-insulators. D) None. Show Answer Correct Answer: B) Insulators. 58. If the direction of current in a coil at its one face is anti-clockwise this end of coil will be: A) South pole. B) North pole. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: A) South pole. 59. A 120 w light bulb uses more ..... than a 60 w light bulb. A) Thermal energy. B) Electrical energy. C) All the above. D) None of the above. Show Answer Correct Answer: B) Electrical energy. 60. Alloys of metals A) Allow electric current to flow through them. B) Do not allow electric current to flow through them. C) Sometimes allow and sometimes do not allow electric current to flow through them. D) None of these. Show Answer Correct Answer: A) Allow electric current to flow through them. ← PreviousNext →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 10 Electric Current And Its Effects Quiz 1Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 2Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 3Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 4Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 5Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 6Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 7Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books