Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 724 · 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.🔋 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)? =
2. 2.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
3. 3.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
4. 4.True or false: an LED lamp mainly gives out light. (a) False (b) True
5. 5.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
6. 6.True or false: a toggle switch stays where you flip it. (a) True (b) False
7. 7.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
8. 8.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
9. 9.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.True or false: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
11. 11.💡 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
12. 12.🔍 Which is the odd one out? (a) an iron nail (b) a metal paper clip (c) a copper wire (d) a glass marble
13. 13.True or false: a circle with V inside is the symbol for a capacitor. (a) False (b) True
14. 14.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
16. 16.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
17. 17.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) never (c) only when both are ON (d) when either is ON
18. 18.🔋 2 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) by Wi-Fi (d) in parallel
20. 20.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) all wires are joined (c) a cell is taken out (d) a wire has come loose
21. 21.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) ammeter (b) junction (c) resistor (d) battery
22. 22.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
23. 23.Which of these is an insulator? (a) a graphite rod (b) a rubber band (c) aluminium foil (d) a copper wire
24. 24.Which drawing is the symbol for an ammeter? (a) a dot where wires meet (b) a circle with A inside (c) a line lifted at a gap (d) a circle with an X in it
25. 25.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
26. 26.Which of these is safe? (a) use a cable with cuts (b) throw cells in a fire (c) use small battery cells (d) climb an electric pole
27. 27.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) own switch for each bulb (d) a single current path
28. 28.Which of these is not safe? (a) stop if a part gets hot (b) stay away from pylons (c) take cells out after use (d) touch a fallen wire
29. 29.🔋 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
30. 30.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
31. 31.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.⚡ What does a loudspeaker mainly change electricity into? (a) movement (b) heat (c) sound (d) light
34. 34.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a fuse or MCB (d) a plug top
35. 35.🔋 6 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.🔌 Most metals are good … (a) conductors (b) batteries (c) insulators (d) magnets only
37. 37.🔋 3 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.True or false: to stop if a part gets hot is not safe. (a) True (b) False
39. 39.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
40. 40.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) pull them by the hand (d) wait and watch

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