This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... is neutral in nature. A) Electron. B) Proton. C) Neutron. D) None of the above. Show Answer Correct Answer: C) Neutron. 2. What's the difference between a solenoid and an electromagnet? A) Solenoids do not use a power source. B) Electromagnets include a nail inside the coils. C) Solenoids include a nail inside the coils. D) Electromagnets do no use wire. Show Answer Correct Answer: B) Electromagnets include a nail inside the coils. 3. What factors affect the resistance of a conductor? A) Material, length, thickness, and temperature. B) Material, voltage, current, and temperature. C) Length, voltage, current, and temperature. D) Thickness, voltage, current, and temperature. Show Answer Correct Answer: A) Material, length, thickness, and temperature. 4. Which two objects are necessary to complete an electric circuit? A) A light bulb and a switch. B) A power source and a light bulb. C) A path for energy to flow and a switch. D) A power source and a path for energy to flow. Show Answer Correct Answer: D) A power source and a path for energy to flow. 5. If a circuit has a voltage of 9 volts and a resistance of 3 ohms, what is the current flowing through the circuit? A) 3 amperes. B) 27 amperes. C) 0.33 amperes. D) 12 amperes. Show Answer Correct Answer: A) 3 amperes. 6. What is a storage cell? A) A one-use source of electrical energy. B) A re-chargeable source of electrical energy. C) A one-use source of solar electricity. D) None of the above. Show Answer Correct Answer: B) A re-chargeable source of electrical energy. 7. If voltage applied to a circuit that obeys Ohm's law is tripled the resistance will ..... A) Double. B) Decrease by one third. C) Triple as will. D) Not change. Show Answer Correct Answer: D) Not change. 8. Closed pathway that electricity flows through A) Battery. B) Conductor. C) Insulator. D) Circuit. Show Answer Correct Answer: D) Circuit. 9. When socks stick together in the dryer, there is a buildup of ..... charges on one sock and positive charges on the other sock. A) Positive. B) No. C) Wet. D) Negative. Show Answer Correct Answer: D) Negative. 10. What is the relationship between resistance and conductance? A) Resistance and conductance are inversely related; G = 1/R. B) Conductance is the same as resistance in all cases. C) Resistance increases with higher conductance values. D) Resistance and conductance are directly related; G = R. Show Answer Correct Answer: A) Resistance and conductance are inversely related; G = 1/R. 11. Metals have A) Zero resistivity. B) High resistivity. C) Low resistivity. D) Infinite resistivity. Show Answer Correct Answer: C) Low resistivity. 12. What is a formula to calculate Current A) I=Q/t. B) I=Q*t. C) I =V*R. D) I = R/V. Show Answer Correct Answer: A) I=Q/t. 13. Two bulbs 40 W and 60 W and rated voltage 240 V are connected in series across a potential difference of 420 V. Which bulb will fuse? A) 40 W. B) 60 W. C) Both 40 W and 60 W. D) None of the bulbs. Show Answer Correct Answer: A) 40 W. 14. The current in a conductor varies with time t as I=2t+3 $t^2$ A) 10C. B) 24C. C) 33C. D) 44C. Show Answer Correct Answer: B) 24C. 15. Calculate the current flowing through a wire of resistance 10 $\Omega$ connected to a battery of potential difference 30 V. A) 300 A. B) 0.333 A. C) 3 A. D) None of the above. Show Answer Correct Answer: C) 3 A. 16. When a conducting wire is stretched to double its initial length, then which property of conducting wire increases? A) Resistivity. B) Resistance. C) Volume. D) Density. Show Answer Correct Answer: B) Resistance. 17. The amount of charge flowing through a cross-sectional area of a wire per unit of time is called: A) Voltage. B) Power. C) Resistance. D) Work. E) Current. Show Answer Correct Answer: E) Current. 18. As the temperature of a conductor increases both it's Resistivity and Conductivity change.Will the ratio of its Resistivity and conductivity A) Increases. B) Decreases. C) Remain same. D) None of these. Show Answer Correct Answer: A) Increases. 19. What does a turbine spin through to generate an electrical current? A) A magnetic field. B) A water stream. C) A wind tunnel. D) None of the above. Show Answer Correct Answer: A) A magnetic field. 20. What is the direction of positive charge flow in a circuit? A) In a clockwise direction. B) From negative to positive terminal. C) In a counterclockwise direction. D) From positive to negative terminal. Show Answer Correct Answer: D) From positive to negative terminal. 21. A build up of electrical charges in an object A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 22. According to Ohm's Law, if you were to double the voltage and double the resistance, what would happen to the flow of current? A) It would stay the same. B) It would increase 2x. C) It would increase 4x. D) It would decrease 2x. Show Answer Correct Answer: A) It would stay the same. 23. Why is static electricity not useful as a power source? A) Because electrons aren't transferred in burst of static electricity. B) Because ALL energy is released at once in static electricity. C) Because static electricity is not a real form of electricity. D) Because static electricity only occurs in lightening. Show Answer Correct Answer: B) Because ALL energy is released at once in static electricity. 24. Two resistors of resistance 3 ohm and 5 ohm are connected in series. Another resistor of 6 ohm is connected in parallel to the above two resistors. If this arrangement is connected to a 10 V battery then what is the current withdrawn by the combination? A) 2 A. B) 2.9 A. C) 0.34 A. D) None of above. Show Answer Correct Answer: B) 2.9 A. 25. A flaw in a circuit that allows a large current to flow through where it isn't wanted is called ..... A) An open circuit. B) An insulator. C) A conductor. D) A short circuit. Show Answer Correct Answer: D) A short circuit. ← 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