Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 859 · 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.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
2. 2.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire is cut
3. 3.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
4. 4.Which drawing is the symbol for a capacitor? (a) a small empty box (b) a circle with M inside (c) two equal parallel lines (d) triangle against a bar
5. 5.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a stranger online (c) nobody (d) a trusted adult
6. 6.🔍 Which is the odd one out? (a) touch a fallen wire (b) use a cable with cuts (c) fly a kite near wires (d) stop if a part gets hot
7. 7.🔦 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 glass marble. Does the bulb glow? (a) Yes (b) No
8. 8.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) switch (b) cell (c) LED (d) junction
9. 9.True or false: a plastic straw is a conductor. (a) True (b) False
10. 10.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a graphite rod (d) a plastic straw
11. 11.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
12. 12.🔦 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) No (b) Yes
13. 13.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
14. 14.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) many paths for current (d) used in house wiring
15. 15.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
16. 16.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
18. 18.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.🔦 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
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
21. 21.Which of these means the circuit is closed? (a) a wire has come loose (b) a wire is cut (c) a cell is taken out (d) all wires are joined
22. 22.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the glass (d) the base
23. 23.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
24. 24.Which drawing is the symbol for a junction? (a) two or more cell symbols (b) a line lifted at a gap (c) a small empty box (d) a dot where wires meet
25. 25.What does a slide switch do? (a) closes when tipped over (b) slides side to side (c) works only while pressed (d) stays where you flip it
26. 26.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
27. 27.Which of these uses electricity? (a) a computer (b) a cell (c) a generator (d) a wind turbine
28. 28.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
29. 29.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
30. 30.True or false: to build with an adult near is safe. (a) False (b) True
31. 31.True or false: a circle with an X in it is the symbol for a diode. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a plastic ruler (b) a metal paper clip (c) a brass key (d) a steel coin
33. 33.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a slide switch
34. 34.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
35. 35.🔘 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 ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
36. 36.True or false: a rubber band is a conductor. (a) False (b) True
37. 37.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
38. 38.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
39. 39.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a plug top (c) a fuse or MCB (d) a bulb
40. 40.True or false: a dot where wires meet is the symbol for a bulb. (a) True (b) False

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