Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 167 · 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.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
3. 3.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
4. 4.True or false: an iron nail is an insulator. (a) True (b) False
5. 5.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
6. 6.What does a toggle switch do? (a) springs back when let go (b) closes near a magnet (c) stays where you flip it (d) slides side to side
7. 7.🔍 Which is the odd one out? (a) a siren (b) a loudspeaker (c) a water heater (d) a doorbell
8. 8.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
9. 9.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
10. 10.Which of these uses electricity? (a) a bicycle dynamo (b) a cell (c) a television (d) a wind turbine
11. 11.Which drawing is the symbol for a resistor? (a) triangle against a bar (b) a small empty box (c) a circle with V inside (d) one tall, one short bar
12. 12.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
13. 13.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
14. 14.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
15. 15.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
16. 16.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
17. 17.True or false: to fly kites in open fields is not safe. (a) True (b) False
18. 18.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
19. 19.Which drawing is the symbol for a diode? (a) triangle, bar and arrows (b) a small empty box (c) triangle against a bar (d) a circle with M inside
20. 20.Which drawing is the symbol for an ammeter? (a) a circle with M inside (b) a straight line (c) triangle, bar and arrows (d) a circle with A inside
21. 21.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) diode (b) battery (c) ammeter (d) junction
22. 22.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
23. 23.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
24. 24.Which of these gives us electricity? (a) a computer (b) a washing machine (c) a television (d) a wind turbine
25. 25.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) many paths for current (d) own switch for each bulb
26. 26.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.What does a tilt switch do? (a) flips up or down (b) closes when tipped over (c) springs back when let go (d) works only while pressed
29. 29.What does a slide switch do? (a) closes near a magnet (b) stays where you flip it (c) closes when tipped over (d) slides side to side
30. 30.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
31. 31.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
32. 32.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) opens or closes the loop (d) changes the voltage
33. 33.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
34. 34.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) little stars (d) wavy lines
36. 36.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
37. 37.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) resistor (c) bulb (d) diode
38. 38.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.🔍 Which is the odd one out? (a) a metal paper clip (b) a steel coin (c) aluminium foil (d) a ceramic cup

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