Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 541 · 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.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) voltmeter (b) capacitor (c) motor (d) junction
3. 3.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
4. 4.True or false: to touch a switch when wet is not safe. (a) False (b) True
5. 5.Which of these is an insulator? (a) a copper wire (b) a brass key (c) a metal paper clip (d) a wooden stick
6. 6.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
7. 7.🔍 Which is the odd one out? (a) poke things in a socket (b) use a cable with cuts (c) use mains for a project (d) keep drinks far away
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
9. 9.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.What does a toggle switch do? (a) stays where you flip it (b) springs back when let go (c) closes when tipped over (d) slides side to side
11. 11.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the metal tip (c) the plastic handle (d) the steel shaft
12. 12.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
13. 13.True or false: to use small battery cells is not safe. (a) False (b) True
14. 14.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) a dot where wires meet (c) a long and a short line (d) a plain rectangle
15. 15.Which of these is safe? (a) touch a switch when wet (b) throw cells in a fire (c) build with an adult near (d) poke things in a socket
16. 16.Which of these gives us electricity? (a) a refrigerator (b) a cell (c) a computer (d) a mobile phone
17. 17.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
18. 18.Which of these gives us electricity? (a) a mobile phone (b) a computer (c) a battery (d) a washing machine
19. 19.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.🔍 Which is the odd one out? (a) a traffic signal (b) a night lamp (c) a school bell (d) an LED lamp
21. 21.🔍 Which is the odd one out? (a) climb an electric pole (b) poke things in a socket (c) use mains for a project (d) build with an adult near
22. 22.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
23. 23.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 2 and 4 are taken out of their holders. Does bulb 1 glow? (a) Yes (b) No
24. 24.Which of these is a conductor? (a) a wooden stick (b) a steel coin (c) a cotton thread (d) a rubber eraser
25. 25.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
26. 26.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
27. 27.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
28. 28.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
29. 29.True or false: to use a cable with cuts is safe. (a) False (b) True
30. 30.Which of these means the circuit is open? (a) the loop is complete (b) the bulb is unscrewed (c) the switch is ON (d) all wires are joined
31. 31.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
32. 32.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
33. 33.True or false: two or more cell symbols is the symbol for a switch. (a) True (b) False
34. 34.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) heat (c) movement (d) sound
35. 35.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) electrons (d) photons
36. 36.Which of these is a conductor? (a) an iron nail (b) a paper strip (c) a plastic ruler (d) a rubber eraser
37. 37.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.🔍 Which is the odd one out? (a) a rice cooker (b) an electric kettle (c) an electric toy car (d) an electric iron
39. 39.True or false: to take cells out after use is safe. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a steel spoon (b) a brass key (c) an iron nail (d) a plastic straw

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