Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 277 · 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 toggle switch flips up or down. (a) True (b) False
2. 2.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
3. 3.Which of these is not safe? (a) keep drinks far away (b) use small battery cells (c) dry your hands first (d) throw cells in a fire
4. 4.True or false: one tall, one short bar is the symbol for a resistor. (a) False (b) True
5. 5.What does a toggle switch do? (a) springs back when let go (b) closes when tipped over (c) closes near a magnet (d) stays where you flip it
6. 6.💡 A battery lights 4 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
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) dotted circles (d) little stars
8. 8.🔍 Which is the odd one out? (a) open a phone charger (b) climb an electric pole (c) use mains for a project (d) keep drinks far away
9. 9.Which of these is true of a series circuit? (a) bulbs share the voltage (b) many paths for current (c) one out, the rest glow (d) own switch for each bulb
10. 10.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
11. 11.Which of these is true of a series circuit? (a) a single current path (b) own switch for each bulb (c) used in house wiring (d) each gets the full volts
12. 12.🔍 Which is the odd one out? (a) stop if a part gets hot (b) build with an adult near (c) use small battery cells (d) poke things in a socket
13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
15. 15.Which of these mainly gives out heat? (a) a water heater (b) an electric drill (c) a loudspeaker (d) a school bell
16. 16.What does a reed switch do? (a) stays where you flip it (b) closes near a magnet (c) springs back when let go (d) works only while pressed
17. 17.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one bulb out, all go out (d) one out, the rest glow
18. 18.🔍 Which is the odd one out? (a) use small battery cells (b) fly kites in open fields (c) stop if a part gets hot (d) use mains for a project
19. 19.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
20. 20.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) motor (b) bulb (c) voltmeter (d) cell
21. 21.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
22. 22.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
23. 23.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
24. 24.🔦 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
25. 25.🔦 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) Yes (b) No
26. 26.Which of these uses electricity? (a) a battery (b) a solar panel (c) a cell (d) a mobile phone
27. 27.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
28. 28.🔦 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 eraser. Does the bulb glow? (a) Yes (b) No
29. 29.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
31. 31.🔋 4 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 it safe to throw cells in a fire? (a) not safe (b) safe
33. 33.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
34. 34.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a trusted adult (c) nobody (d) a younger child
36. 36.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the plastic handle (d) the metal tip
37. 37.Which of these uses electricity? (a) a generator (b) a power station (c) a water pump (d) a bicycle dynamo
38. 38.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) water drops (d) photons
39. 39.🔘 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 OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
40. 40.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) used in house wiring (d) a single current path

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