This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Fill in the blank:Like Charges will ..... one another. A) Attract. B) Repel. C) Discharge. D) Neutralize. E) Short Circuit. Show Answer Correct Answer: B) Repel. 2. Why Nichrome is used in heaters? A) It has low melting point. B) It has high specific resistance. C) Low specific resistance. D) None of the above. Show Answer Correct Answer: B) It has high specific resistance. 3. What is the role of a fuse in an electrical circuit? A) To increase current. B) To decrease voltage. C) To protect the circuit by breaking the connection if the current is too high. D) To store electrical energy. Show Answer Correct Answer: C) To protect the circuit by breaking the connection if the current is too high. 4. Which of the following determines whether or not a material is magnetic? A) The density of the material. B) The weight of the material on Earth. C) The alignment of atoms in the material. D) The number of elements that make up the material. Show Answer Correct Answer: C) The alignment of atoms in the material. 5. A potentiometer having wire 1000cm long stretched on it is connected to a battery having a steady voltage, A Daniel cell gives a null point at 400cm. if the length of potentiometer wire increased by 200cm find the new position of null point A) 360cm. B) 400cm. C) 440cm. D) 480cm. Show Answer Correct Answer: D) 480cm. 6. Which components could complete an electric circuit? A) Wire, bulb, switch. B) Battery, bulb, switch. C) Battery, wire, switch. D) Battery, wire, bulb. Show Answer Correct Answer: D) Battery, wire, bulb. 7. How does current electricity differ from static electricity in terms of electron movement? A) Current electricity involves a steady flow of electrons, while static electricity involves a sudden discharge. B) Static electricity involves a steady flow of electrons, while current electricity involves a sudden discharge. C) Both involve a steady flow of electrons. D) Both involve a sudden discharge of electrons. Show Answer Correct Answer: A) Current electricity involves a steady flow of electrons, while static electricity involves a sudden discharge. 8. How is an electromagnet like a bar magnet? A) They are both made of wire. B) They both need electricity to work. C) They both have a N pole and a S pole. D) They are both strong permanent magnets. Show Answer Correct Answer: C) They both have a N pole and a S pole. 9. Why do clothes often stick together after being in a dryer? A) Because of the heat generated by the dryer. B) Due to static electricity generated by friction. C) Because of the moisture left in the clothes. D) Due to the magnetic properties of the fabric. Show Answer Correct Answer: B) Due to static electricity generated by friction. 10. The electrons that can move freely inside the metals are called ..... electrons. A) Insulators. B) Conduction. C) Conductors. D) None of the above. Show Answer Correct Answer: B) Conduction. 11. The resistance of a wire is R. If the length of the wire is doubled by stretching, then the new resistance will be A) 2 R. B) 4 R. C) R. D) R/4. Show Answer Correct Answer: B) 4 R. 12. Three resistors of 2.5Ohms, 10 Ohms and 6.5Ohms are connected in series. what single resistor can replace them A) 19 $\Omega$. B) 6.33 $\Omega$. C) 18.5 $\Omega$. D) None of the above. Show Answer Correct Answer: A) 19 $\Omega$. 13. N resistances, each of r $\Omega$, when connected in parallel give an equivalent resistance of R $\Omega$. If these resistances were connected in series, the combination would have a resistance in ohms A) N$^{2}$R. B) R / n$^{2}$. C) R / n. D) NR. Show Answer Correct Answer: A) N$^{2}$R. 14. Current is a ..... quantity A) High. B) Scalar. C) Vector. D) Low. Show Answer Correct Answer: B) Scalar. 15. To get current electricity, you must have a path or circuit for the electrons to move. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. Insulator or Conductor?STEEL A) Insulator. B) Conductor. C) All the above. D) None of the above. Show Answer Correct Answer: B) Conductor. 17. J of heat is produced each second in a 4$\Omega$ resistor. The potential difference across the resistor will be: A) 30 V. B) 10 V. C) 20 V. D) 25 V. Show Answer Correct Answer: B) 10 V. 18. When several light bulbs are connected in a series circuit, what will happen if one bulb burns out? A) All of the light bulbs will go out. B) The other bulbs will continue to burn. C) The other bulbs will burn together. D) There will be a short circuit. Show Answer Correct Answer: A) All of the light bulbs will go out. 19. Dimension of Electric Current A) MLT. B) LA. C) AT. D) A. Show Answer Correct Answer: D) A. 20. Which of the following is not the expression for power? A) P = VI. B) P = V$^{2}$/R. C) P = I$^{2}$ R. D) P = I$^{2}$/R. Show Answer Correct Answer: D) P = I$^{2}$/R. 21. Which type of energy produces Carbon Dioxide, which can be harmful to our planet and cause pollution? A) Solar Energy. B) Wind Energy. C) Fossil Fuels (Coal, oil, and gas). D) Nuclear Energy. Show Answer Correct Answer: C) Fossil Fuels (Coal, oil, and gas). 22. Resistance is measured in what units? A) Volts. B) Amperes. C) Ohms. D) Kapernicks. Show Answer Correct Answer: C) Ohms. 23. Which sign is associated with a negative charge? A) =. B) +. C) -. D) $. Show Answer Correct Answer: C) -. 24. By increasing the temperature the resistance of a conductor A) Increases. B) Decreases. C) Remains constant. D) Initially increases then decreases. Show Answer Correct Answer: A) Increases. 25. An object that is positively charged contains an excess of: A) Protons. B) Neutrons. C) Electrons. D) Positrons. Show Answer Correct Answer: A) Protons. ← PreviousNext →Related QuizzesClass 12 Physics (Part I) Chapter 3 Current Electricity Quiz 1Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 2Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 3Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 4Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 5Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 6Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 7Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 8Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 9Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books