This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following components is essential for a simple electric circuit to function? A) Resistor. B) Capacitor. C) Battery. D) Transistor. Show Answer Correct Answer: C) Battery. 2. What does Kirchhoff's second law show? A) Conservation of charge. B) Conservation of energy. C) In any closed loop, the sum of the e.m.f. is equal to the sum of the products of the current and the resistance (potential difference). D) The sum of the current entering a junction is the sum of the current leaving the junction. Show Answer Correct Answer: C) In any closed loop, the sum of the e.m.f. is equal to the sum of the products of the current and the resistance (potential difference). 3. Materials that cut down or resist the flow of charges are called? A) Conductors. B) Insulators. C) Resistors. D) Circuts. Show Answer Correct Answer: C) Resistors. 4. Which of the following is a real-world application of static electricity? A) Powering a car engine. B) Operating a computer. C) Photocopier function. D) Lighting a bulb. Show Answer Correct Answer: C) Photocopier function. 5. What two conditions are necessary for the flow of current? A) Resistance and Capacitance. B) Inductance and Resistance. C) Voltage and a Complete Circuit. D) Voltage and an Open Circuit. Show Answer Correct Answer: C) Voltage and a Complete Circuit. 6. A material with negative temperature coefficient of resistance is called A) Metal. B) Alloy. C) Thermistor. D) Thermometer. Show Answer Correct Answer: C) Thermistor. 7. Where would you place an ammeter in a series circuit to get a reading? A) Next to the cell only. B) In parallel with the component. C) In parallel with the cell. D) Anywhere in the circuit. Show Answer Correct Answer: D) Anywhere in the circuit. 8. Name one D.C source. A) A.C generator. B) Cell. C) Lead accumulator. D) Ni-Fe accumulator. Show Answer Correct Answer: B) Cell. 9. Which of the following is NOT a hazard with electricity. A) Static shocks from getting back in your car when filling your gas. B) Having a shower during a thunder storm. C) Fixing a toaster while it is still plugged in. D) Using your cellphone while adding gas to your car. Show Answer Correct Answer: D) Using your cellphone while adding gas to your car. 10. In Direct Current (DC), how do electric charges move? A) In one direction. B) In a circular motion. C) In random directions. D) In alternating directions. Show Answer Correct Answer: A) In one direction. 11. An electromagnet's poles may be reversed by: A) Decreasing the voltage of the coil. B) Increasing the number of coils. C) Changing the direction of current flow. D) Altering the material used to make the coils. Show Answer Correct Answer: C) Changing the direction of current flow. 12. A circuit with gaps is called a(n) ..... circuit. A) Open. B) Closed. C) Series. D) Parallel. Show Answer Correct Answer: A) Open. 13. A solution of NaCl discharges 6.1 x 10$^{16}$ Na$^{+}$ ions and 4.6 x 10$^{16}$ Cl$^{-}$ ions in 2 seconds. Find the current passing through the solution A) 3.56 x 10$^{-3 }$A. B) 8.56 x 10$^{-3 }$A. C) 1.56 x 10$^{-3 }$A. D) 2.56 x 10$^{-3 }$A. Show Answer Correct Answer: B) 8.56 x 10$^{-3 }$A. 14. Current carriers in Electrolyte are/is A) Free electrons. B) Holes. C) Electrons and holes both. D) Positive and negative ions. Show Answer Correct Answer: D) Positive and negative ions. 15. If a current of 3 A flows through a resistor connected to 90 V, what is the resistance? (R=V/I) ***You will need to show the work for this problem on paper*** A) 3 $\Omega$. B) 20 $\Omega$. C) 30 $\Omega$. D) 90 $\Omega$. Show Answer Correct Answer: C) 30 $\Omega$. 16. What is electricity? A) The energy produced when an object vibrates. B) The energy stored in the bonds of chemical compounds. C) The energy produced by electrons. D) The energy of motion. Show Answer Correct Answer: C) The energy produced by electrons. 17. A flow of electric charges A) Electric current. B) Motor. C) Energy. D) Filament. Show Answer Correct Answer: A) Electric current. 18. Analysis of a circuit produces two loop equations:10x + 30y = 7 and 40x-20y = 0What are the currents x and y? A) X = 50 and y = 10. B) X = 0.2 and y = 0.1. C) X = 0.01 and y = 0.02. D) Y = 0.2 and x = 0.1. Show Answer Correct Answer: D) Y = 0.2 and x = 0.1. 19. According to Ohm's Law, what is the relationship between current and potential difference? A) No Relationship. B) Directly Proportional. C) Exponential Relationship. D) Inversely Proportional. Show Answer Correct Answer: B) Directly Proportional. 20. The voltage across a cooker is 230 V. There is a current of 12 A for 10 minutes. Calculate the total amount of energy. A) 28 kJ. B) 1.7 kJ. C) 1.7 MJ. D) 2 kJ. Show Answer Correct Answer: C) 1.7 MJ. 21. The drift speed of electron in copper wire of diameter d and length l is v. If the potential difference across the wire is doubled, then the new drift velocity will be A) V. B) 2v. C) 3v. D) V/2. Show Answer Correct Answer: B) 2v. 22. In liquids, movement of ..... and ..... cause electric current. A) Electron, proton. B) Electron, neutrons. C) Positive and negative ions. D) None of the above. Show Answer Correct Answer: C) Positive and negative ions. 23. Potentiometer measures potential difference more accurately than a voltmeter because A) It does not draw current from external circuit. B) It draws heavy current from external circuit. C) It has a high wire of resistance. D) It has a wire of low resistance. Show Answer Correct Answer: A) It does not draw current from external circuit. 24. Is it possible to CREATE electrons? A) Yes, that's what static electricity is. B) No, you can move them, but they are never created or distroyed. C) Sometimes, it depends on the voltage. D) Sometimes, it depends on the element. Show Answer Correct Answer: B) No, you can move them, but they are never created or distroyed. 25. What is an example of static electricity? A) A flowing river. B) Lightning. C) A burning candle. D) None of the above. Show Answer Correct Answer: B) Lightning. ← 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