Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 703 · 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.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.True or false: to stay away from pylons is safe. (a) False (b) True
3. 3.Which drawing is the symbol for a motor? (a) many long-short pairs (b) a small empty box (c) a line lifted at a gap (d) a circle with M inside
4. 4.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) a graphite rod (b) a plastic straw (c) a copper wire (d) a metal paper clip
6. 6.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
7. 7.True or false: an exhaust fan mainly makes movement. (a) True (b) False
8. 8.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
9. 9.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) all wires are joined (d) the switch is OFF
10. 10.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
11. 11.🔍 Which is the odd one out? (a) an exhaust fan (b) a torch (c) an electric drill (d) a table fan
12. 12.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a tilt switch (d) a reed switch
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
14. 14.💡 6 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?
15. 15.🔘 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
16. 16.True or false: a water heater mainly gives out heat. (a) False (b) True
17. 17.True or false: a rice cooker mainly gives out heat. (a) False (b) True
18. 18.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
19. 19.Which of these gives us electricity? (a) a generator (b) a washing machine (c) a computer (d) a mobile phone
20. 20.🔦 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 graphite rod. Does the bulb glow? (a) Yes (b) No
21. 21.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a closed circuit (d) a full circuit
22. 22.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
23. 23.Which drawing is the symbol for an LED? (a) two or more cell symbols (b) triangle, bar and arrows (c) triangle against a bar (d) a circle with a cross
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) cell (b) voltmeter (c) bulb (d) switch
25. 25.True or false: one tall, one short bar is the symbol for a cell. (a) True (b) False
26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
29. 29.🔘 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 ON and D is ON. Does the bulb glow? (a) No (b) Yes
30. 30.Which drawing is the symbol for a capacitor? (a) a circle with a cross (b) two equal parallel lines (c) triangle, bar and arrows (d) a circle with V inside
31. 31.True or false: a graphite rod is a conductor. (a) True (b) False
32. 32.💡 5 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 3 and 5 are taken out of their holders. How many bulbs glow?
33. 33.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) it is just untidy (d) water makes it cold
34. 34.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
35. 35.Which of these is not safe? (a) stay away from pylons (b) build with an adult near (c) fly a kite near wires (d) fly kites in open fields
36. 36.🔍 Which is the odd one out? (a) fly kites in open fields (b) build with an adult near (c) stay away from pylons (d) fly a kite near wires
37. 37.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
38. 38.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) friction (d) a magnet
39. 39.Which of these is true of a series circuit? (a) a break stops every bulb (b) one out, the rest glow (c) own switch for each bulb (d) used in house wiring
40. 40.True or false: to stay away from pylons is not safe. (a) True (b) False

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