Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 595 · 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.🔍 Which is the odd one out? (a) climb an electric pole (b) open a phone charger (c) stay away from pylons (d) throw cells in a fire
2. 2.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly a kite near wires (c) poke things in a socket (d) throw cells in a fire
3. 3.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
4. 4.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
5. 5.Which of these mainly makes movement? (a) a loudspeaker (b) a rice cooker (c) a tube light (d) an exhaust fan
6. 6.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
8. 8.True or false: a rice cooker mainly gives out heat. (a) True (b) False
9. 9.True or false: a reed switch springs back when let go. (a) False (b) True
10. 10.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 4 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?
12. 12.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) build with an adult near (b) open a phone charger (c) use a cable with cuts (d) throw cells in a fire
14. 14.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
15. 15.🔍 Which is the odd one out? (a) fly a kite near wires (b) take cells out after use (c) fly kites in open fields (d) dry your hands first
16. 16.💡 4 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?
17. 17.🔍 Which is the odd one out? (a) build with an adult near (b) fly kites in open fields (c) dry your hands first (d) poke things in a socket
18. 18.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) cut them open (d) bury them in soil
19. 19.⚡ What does a toaster mainly change electricity into? (a) sound (b) movement (c) heat (d) light
20. 20.True or false: triangle, bar and arrows is the symbol for a capacitor. (a) True (b) False
21. 21.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
22. 22.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a safe circuit (d) a short circuit
23. 23.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
24. 24.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) a stranger online (d) nobody
25. 25.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
26. 26.Which of these is an insulator? (a) a dry cork (b) a metal paper clip (c) a steel spoon (d) an iron nail
27. 27.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
29. 29.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
30. 30.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) one bulb out, all go out (d) each gets the full volts
31. 31.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 1.5 V (d) 230 V
34. 34.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
35. 35.🔦 A circuit has a used-up (dead) 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
36. 36.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a ceramic cup. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
39. 39.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
40. 40.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity

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