Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 883 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
2. 2.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a cell (c) a switch that is ON (d) a conductor
3. 3.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) heat (c) light (d) movement
4. 4.True or false: a toggle switch slides side to side. (a) False (b) True
5. 5.⚡ What does an electric drill mainly change electricity into? (a) light (b) movement (c) sound (d) heat
6. 6.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
7. 7.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
8. 8.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
9. 9.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) a small battery pack (d) an inverter socket
10. 10.Which of these means the circuit is open? (a) the loop is complete (b) a wire has come loose (c) all wires are joined (d) the switch is ON
11. 11.True or false: a ceiling fan mainly gives out heat. (a) False (b) True
12. 12.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
13. 13.🔍 Which is the odd one out? (a) a safety pin (b) a metal paper clip (c) a dry cork (d) an iron nail
14. 14.What does a slide switch do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) works only while pressed
15. 15.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) a cell is taken out
16. 16.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a switch with a lid (d) a kind of bulb
17. 17.True or false: a toggle switch stays where you flip it. (a) False (b) True
18. 18.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) throw them in a fire (d) bury them in soil
19. 19.True or false: a night lamp mainly makes movement. (a) True (b) False
20. 20.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) a plain rectangle (c) a circle with A inside (d) a long and a short line
21. 21.Which of these is safe? (a) touch a fallen wire (b) build with an adult near (c) poke things in a socket (d) use a cable with cuts
22. 22.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
23. 23.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
24. 24.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
25. 25.True or false: a toaster mainly gives out light. (a) True (b) False
26. 26.What does a reed switch do? (a) flips up or down (b) springs back when let go (c) stays where you flip it (d) closes near a magnet
27. 27.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) one bulb out, all go out (d) used in house wiring
28. 28.True or false: a glass marble is a conductor. (a) True (b) False
29. 29.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a line lifted at a gap (c) a plain rectangle (d) many long-short pairs
30. 30.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
33. 33.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a short circuit (c) a safe circuit (d) a parallel circuit
36. 36.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
37. 37.True or false: to stop if a part gets hot is not safe. (a) True (b) False
38. 38.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) switch (c) voltmeter (d) diode
39. 39.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
40. 40.Which of these is an insulator? (a) a graphite rod (b) a metal paper clip (c) a brass key (d) a rubber band

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