Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 406 · 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: a steel spoon is a conductor. (a) False (b) True
2. 2.Which drawing is the symbol for a battery? (a) a small empty box (b) one tall, one short bar (c) two or more cell symbols (d) a circle with a cross
3. 3.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.True or false: a doorbell mainly makes sound. (a) False (b) True
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
6. 6.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
7. 7.🔍 Which is the odd one out? (a) a copper wire (b) a dry cork (c) aluminium foil (d) a steel spoon
8. 8.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
9. 9.True or false: to stop if a part gets hot is safe. (a) True (b) False
10. 10.Which of these is an insulator? (a) aluminium foil (b) an iron nail (c) a wooden stick (d) a steel coin
11. 11.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
12. 12.🔍 Which is the odd one out? (a) touch a switch when wet (b) stay away from pylons (c) open a phone charger (d) poke things in a socket
13. 13.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) when either is ON (d) never
15. 15.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a switch with a lid (d) a kind of bulb
16. 16.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
18. 18.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) changes the voltage (d) makes electricity
19. 19.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
20. 20.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
21. 21.True or false: a table fan mainly gives out heat. (a) True (b) False
22. 22.Which of these is not safe? (a) dry your hands first (b) throw cells in a fire (c) use small battery cells (d) fly kites in open fields
23. 23.True or false: to use a cable with cuts is safe. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a wooden stick (d) an iron nail
25. 25.🔍 Which is the odd one out? (a) keep drinks far away (b) touch a switch when wet (c) poke things in a socket (d) climb an electric pole
26. 26.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) cell (b) junction (c) wire (d) capacitor
27. 27.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
28. 28.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
29. 29.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
30. 30.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit
31. 31.Which of these is a conductor? (a) a safety pin (b) a woollen thread (c) a rubber eraser (d) a paper strip
32. 32.Which of these is an insulator? (a) a dry cork (b) a brass key (c) a steel spoon (d) a graphite rod
33. 33.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the base (d) the glass
34. 34.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) electric current (c) sound (d) friction
35. 35.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
36. 36.🔍 Which is the odd one out? (a) a water heater (b) a tube light (c) an electric iron (d) a room heater
37. 37.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
38. 38.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
39. 39.🔍 Which is the odd one out? (a) a room heater (b) a rice cooker (c) a doorbell (d) a toaster
40. 40.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) No (b) Yes

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids