This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 38 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The potential difference between the terminals of a 12.0 V battery is 13.2 V when it is being charged by a current of 2.0 A. What is the internal resistance of the battery? (Hint-Use Terminal Potential = EMF-Current*Internal Resistance) A) 1.2 $\Omega$. B) 2.4 $\Omega$. C) 3.6 $\Omega$. D) 0.6 $\Omega$. Show Answer Correct Answer: D) 0.6 $\Omega$. 2. The basic laws for analyzing an electric circuit are:- A) Einstein's theory. B) Faradays laws. C) Kirchhoff's laws. D) Newtons laws. Show Answer Correct Answer: C) Kirchhoff's laws. 3. What is the equivalent resistance of two 6$\Omega$ resistors in series? A) 12$\Omega$. B) 6$\Omega$. C) 18$\Omega$. D) 3$\Omega$. Show Answer Correct Answer: A) 12$\Omega$. 4. Larry uses a transformer to step down an incoming voltage. The transformer has ten loops in the primary coil and six in the secondary. If the incoming voltage is 120 volts, what is the outgoing voltage? A) 720. B) 200. C) 72. D) 240. Show Answer Correct Answer: C) 72. 5. A certain x-ray tube requires a current of 7 mA at a voltage of 80 kV. The rate of energydissipation (in watts) is: A) 560. B) 5600. C) 26. D) 87.5. Show Answer Correct Answer: A) 560. 6. All electrical devices contain electric circuits A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. In a parallel circuit, if one bulb burns out, what happens to the other bulbs? A) All bulbs go out. B) The other bulbs remain lit. C) The circuit breaks completely. D) The voltage increases. Show Answer Correct Answer: B) The other bulbs remain lit. 8. According to equation of continuity, A$_{1}$V$_{1}$ = A$_{2}$V$_{2}$ = constant. The constant is equal to: A) Flow rate. B) Volume of fluid. C) Mass of fluid. D) Density of fluid. Show Answer Correct Answer: A) Flow rate. 9. What is an electrical conductor? A) A material which allows electricity to pass through it. B) A material which allows light to pass through it. C) A material which does not allow electricity to pass through it. D) All of the above. Show Answer Correct Answer: A) A material which allows electricity to pass through it. 10. Why is current electricity a better source for use in our homes than static electricity? A) Electricity is used where people live. B) Materials must be used to create electricity. C) A steady flow of electric current is needed in our homes. D) Different amounts of electricity are used at different times. Show Answer Correct Answer: C) A steady flow of electric current is needed in our homes. 11. Static electricity is caused by ..... A) Dust. B) Trees. C) Pressure. D) Friction. Show Answer Correct Answer: D) Friction. 12. On a bar magnet, where is the strongest magnetic force? A) On the ends of the bar magnet. B) On the top of the bar magnet. C) On the bottom of the bar magnet. D) The bar magnet does not have a magnetic field. Show Answer Correct Answer: A) On the ends of the bar magnet. 13. A circuit has 1250 C flowing through it for 25 s. What is the current in the circuit? A) 25 A. B) 50 A. C) 1250 A. D) 6250 A. Show Answer Correct Answer: B) 50 A. 14. Mobile battle is: A) Li-ion and rechargeable. B) Dry cell and rechargeable. C) Lead acid battery and rechargeable. D) All of the above. Show Answer Correct Answer: A) Li-ion and rechargeable. 15. What effect do like (similar) charges have on each other? A) They attract. B) They repel. C) No effect. D) They reverse each other. Show Answer Correct Answer: B) They repel. 16. When two magnetic South poles are brought close to each other, they will A) Attract. B) Repel. C) Create sparks. D) Cancel each other out. Show Answer Correct Answer: B) Repel. 17. What happens when you touch a metal doorknob after rubbing your shoes on the carpet? A) The doorknob sends a burst of electric current into your body. B) Millions of electrons go from your finger into the doorknob. C) The doorknob sends millions of electrons into your finger. D) Our finger becomes negatively charged. Show Answer Correct Answer: B) Millions of electrons go from your finger into the doorknob. 18. The Ni-Cd cell delivers a potential difference of ..... A) 1 V. B) 1.2 V. C) 1.5 V. D) 2 V. Show Answer Correct Answer: B) 1.2 V. 19. A switch that opens a circuit by turning itself off is a ..... A) Circuit breaker. B) Motor. C) Electromagnet. D) Insulator. Show Answer Correct Answer: A) Circuit breaker. 20. What is the potential difference across an electrical load that has a resistance of 4 $\Omega$ and a current of 3 A flowing through it? A) 4V. B) 8V. C) 12V. D) 16V. Show Answer Correct Answer: C) 12V. 21. A(n) is a closed, or complete, path in which an electric current flows. A) Electric current. B) Electric circuit. C) Electric resistance. D) None of the above. Show Answer Correct Answer: B) Electric circuit. 22. Which of the following statements about a series circuit is not correct? A) The current is the same throughout the circuit. B) The voltage is shared across components. C) Different bulbs can be turned on and off depending on where you place a switch. D) When one bulb is broken the circuit will no longer work. Show Answer Correct Answer: C) Different bulbs can be turned on and off depending on where you place a switch. 23. The distance between the focal point and the mirror is A) Raduis. B) Diameter. C) Focal point. D) Focal length. Show Answer Correct Answer: D) Focal length. 24. A 4000-$\Omega$ resistor is connected across a 220-V power source. What current will flow through the resistor? A) 0.055 A. B) 1.8 A. C) 5.5 A. D) 18 A. Show Answer Correct Answer: A) 0.055 A. 25. What causes electrical fires? A) Long circuits. B) Fuses. C) Short circuits. D) Insulators. Show Answer Correct Answer: C) Short circuits. ← 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