This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The magnetic field lines in the middle of the current carrying solenoid are A) Circles. B) Spirals. C) Parallel to the axis of the tube. D) Perpendicular to the axis of the tube. Show Answer Correct Answer: C) Parallel to the axis of the tube. 2. Lightning is ..... A) A buildup of neutrons. B) Harmless. C) A high-voltage electric current. D) A large discharge of static electricity. Show Answer Correct Answer: D) A large discharge of static electricity. 3. An electric current can produce A) Heating effect. B) Chemical effect. C) Magnetic effect. D) All of these. Show Answer Correct Answer: D) All of these. 4. Which one of the following is based on the heating effect of current? A) Geyser. B) Immersion rod. C) Hair Dryer. D) All of these. Show Answer Correct Answer: D) All of these. 5. Fill in the Blanks:A Fuse Wire has ..... electrical resistance and ..... melting point. A) High, low. B) Low, low. C) Low, high. D) High, high. Show Answer Correct Answer: A) High, low. 6. When a switch is open ..... A) The circuit is working and gives energy. B) The circuit is broken and charges cannot flow. C) The circuit is turning lights on. D) I don't know ask Ms. Cednick. Show Answer Correct Answer: B) The circuit is broken and charges cannot flow. 7. A 2.0 m wire segment carrying a current of0.60 A oriented parallel to a uniform magnetic field of0.50 T experiences a force of what magnitude? A) 0. B) 0.15 N. C) 0.30 N. D) 6.7 N. Show Answer Correct Answer: A) 0. 8. What is current measured in? A) $\Omega$ (Ohms). B) V (Volts). C) A (Amps). D) W (Watts). Show Answer Correct Answer: C) A (Amps). 9. A closed path that electric current follows A) Voltage. B) Current. C) Resistance. D) Circuit. Show Answer Correct Answer: D) Circuit. 10. What is the chemical effect of electric current? A) Increase in temperature. B) Change in color. C) Formation of sound waves. D) Formation of new substances. Show Answer Correct Answer: D) Formation of new substances. 11. If the current flows in same direction the force between the conductors are ..... A) Greater. B) Lesser. C) Attractive. D) Repulsive. Show Answer Correct Answer: C) Attractive. 12. Magnetic field is strongest at A) Near the poles. B) Inside the magnet. C) Outside the magnet. D) Along the parallel sides of the magnet. Show Answer Correct Answer: B) Inside the magnet. 13. Current flows through the circuit when the circuit is in the condition. ( ) A) Broken. B) Closed. C) Open. D) Incomplete. Show Answer Correct Answer: B) Closed. 14. ..... is called the increase in resistance per unit original resistance per degree kelvin rise of temperature A) Thermal velocity. B) Temperature coefficient of electrical resistivity. C) Temperature coefficient of electrical resistance. D) Conducance. Show Answer Correct Answer: C) Temperature coefficient of electrical resistance. 15. When the filament of the bulb breaks then why does the bulb stop glowing? A) Because the circuit is complete. B) Because the circuit gets entangled. C) Because the circuit is incomplete. D) Because the connection of wire becomes loose. Show Answer Correct Answer: C) Because the circuit is incomplete. 16. The average kinetic energy of the particles in a sample A) Heat. B) Temperature. C) Convection. D) Density. Show Answer Correct Answer: B) Temperature. 17. Which one of the following material of wire is used in making elements of heating devices? A) Tin-lead alloy. B) Copper. C) Nichrome. D) Any of the given options. Show Answer Correct Answer: C) Nichrome. 18. What size resistor would produce a 3 Amp current flow with a 12 Volt battery A) 1 Ohm. B) 3 Ohms. C) 4 Ohms. D) 12 Ohms. Show Answer Correct Answer: C) 4 Ohms. 19. If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the circuit? A) 10 amps. B) 1440 amps. C) 0.1 amps. D) 1 amp. Show Answer Correct Answer: A) 10 amps. 20. An ..... behaves like a magnet when an electric current passes through it. A) Electromagnet. B) Switch. C) Cell. D) Wire. Show Answer Correct Answer: A) Electromagnet. 21. What is a complete path through which electric charges can flow called? A) Magnetic pole. B) Electric circuit. C) Electric resistance. D) Magnetic field. Show Answer Correct Answer: B) Electric circuit. 22. What is electroplating? Provide an example. A) Example:Electroplating of diamonds onto a wooden spoon. B) Example:Electroplating of silver onto a copper spoon. C) Example:Electroplating of platinum onto a paper spoon. D) Example:Electroplating of gold onto a plastic spoon. Show Answer Correct Answer: B) Example:Electroplating of silver onto a copper spoon. 23. What are the three chemical effects of current? A) 1.Gas Bubbles may be formed at electrodes2. Metals may get deposited on electrodes3. Change of colour of the solution. B) 1.Heat produced at electrodes.2.Metals deposited on cathode.3.Evolution of smell. C) 1.Gas Bubbles may be formed on cathode.2. Metals may get deposited on electrolyte.3. Change of colour of the solution. D) None of the above. Show Answer Correct Answer: A) 1.Gas Bubbles may be formed at electrodes2. Metals may get deposited on electrodes3. Change of colour of the solution. 24. True or false. Electrons are bound in the nucleus of an atom. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 25. All voltages are safe. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← PreviousNext →Related 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 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 8Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 9Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 10Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books