Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 952 · 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: “many paths for current” is true of a series circuit. (a) True (b) False
2. 2.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a safe circuit (c) an open circuit (d) a parallel circuit
3. 3.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a slide switch
4. 4.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 5 glow? (a) Yes (b) No
5. 5.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) dotted circles (d) little stars
6. 6.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
7. 7.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) used in house wiring (d) a single current path
9. 9.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
12. 12.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the switch is OFF
13. 13.💡 4 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 1 is taken out of its holder. How many bulbs glow?
14. 14.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
16. 16.True or false: to fly kites in open fields is not safe. (a) True (b) False
17. 17.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
18. 18.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) the bulb is unscrewed
19. 19.Which drawing is the symbol for a capacitor? (a) a circle with V inside (b) two equal parallel lines (c) a small empty box (d) triangle, bar and arrows
20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
22. 22.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a cell (d) a switch that is ON
23. 23.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
24. 24.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔦 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) No (b) Yes
26. 26.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) many paths for current (d) one out, the rest glow
27. 27.True or false: a push button flips up or down. (a) False (b) True
28. 28.Which drawing is the symbol for a resistor? (a) a plain rectangle (b) triangle, bar and arrows (c) two or more cell symbols (d) a circle with A inside
29. 29.⚡ What does a loudspeaker mainly change electricity into? (a) heat (b) light (c) movement (d) sound
30. 30.💡 5 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. Does bulb 5 glow? (a) Yes (b) No
31. 31.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
32. 32.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
33. 33.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.🔘 Which kind of switch works only while pressed? (a) a push button (b) a reed switch (c) a toggle switch (d) a slide switch
36. 36.True or false: a cotton thread is a conductor. (a) False (b) True
37. 37.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one for each bulb (d) one
38. 38.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
39. 39.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) never (d) only when both are OFF
40. 40.True or false: a tilt switch closes when tipped over. (a) True (b) False

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