Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 567 · 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.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.Which drawing is the symbol for a diode? (a) many long-short pairs (b) one tall, one short bar (c) triangle against a bar (d) a line lifted at a gap
3. 3.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
4. 4.💡 A battery lights 3 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
5. 5.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
6. 6.🔍 Which is the odd one out? (a) stay away from pylons (b) build with an adult near (c) touch a switch when wet (d) take cells out after use
7. 7.True or false: a circle with A inside is the symbol for a battery. (a) False (b) True
8. 8.Which of these is not safe? (a) open a phone charger (b) build with an adult near (c) use small battery cells (d) stop if a part gets hot
9. 9.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) fly kites in open fields (d) throw cells in a fire
10. 10.Which of these gives us electricity? (a) a refrigerator (b) a computer (c) a water pump (d) a battery
11. 11.What does a reed switch do? (a) springs back when let go (b) flips up or down (c) works only while pressed (d) closes near a magnet
12. 12.True or false: to use a cable with cuts is not safe. (a) False (b) True
13. 13.True or false: a plastic straw is an insulator. (a) True (b) False
14. 14.🔋 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)? =
15. 15.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
17. 17.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) wire (b) ammeter (c) bulb (d) switch
18. 18.Which drawing is the symbol for a junction? (a) a circle with an X in it (b) a circle with A inside (c) a dot where wires meet (d) a circle with M inside
19. 19.True or false: to keep drinks far away is safe. (a) True (b) False
20. 20.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
21. 21.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
22. 22.Which of these mainly makes movement? (a) a school bell (b) a room heater (c) a loudspeaker (d) an electric drill
23. 23.Which of these means the circuit is open? (a) the loop is complete (b) a wire has come loose (c) the switch is ON (d) all wires are joined
24. 24.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) used in house wiring (d) a single current path
25. 25.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔍 Which is the odd one out? (a) open a phone charger (b) stay away from pylons (c) use mains for a project (d) touch a switch when wet
27. 27.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
28. 28.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
29. 29.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
30. 30.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) glass (d) copper
31. 31.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
32. 32.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
33. 33.Which of these is an insulator? (a) a safety pin (b) a metal paper clip (c) a steel coin (d) a cotton thread
34. 34.💡 2 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. Bulb 2 is taken out of its holder. How many bulbs glow?
35. 35.True or false: a reed switch works only while pressed. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) open a phone charger (b) dry your hands first (c) stay away from pylons (d) build with an adult near
37. 37.Which drawing is the symbol for a cell? (a) a circle with M inside (b) one tall, one short bar (c) many long-short pairs (d) a circle with A inside
38. 38.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
39. 39.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) the bulb is unscrewed
40. 40.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True

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