Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 817 · 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.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when either is ON (d) when both are OFF
3. 3.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
4. 4.Which of these mainly makes sound? (a) an electric iron (b) a ceiling fan (c) a water heater (d) a doorbell
5. 5.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the bulb is unscrewed
6. 6.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
7. 7.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
9. 9.Which drawing is the symbol for a bulb? (a) two or more cell symbols (b) a circle with an X in it (c) a circle with M inside (d) triangle against a bar
10. 10.Which of these is not safe? (a) stay away from pylons (b) keep drinks far away (c) use small battery cells (d) fly a kite near wires
11. 11.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
12. 12.Which of these is true of a series circuit? (a) a break stops every bulb (b) each gets the full volts (c) used in house wiring (d) many paths for current
13. 13.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: a wooden stick is an insulator. (a) True (b) False
16. 16.Which of these uses electricity? (a) a power station (b) a cell (c) a generator (d) a washing machine
17. 17.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
18. 18.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) bulb (b) motor (c) wire (d) capacitor
20. 20.Which of these is a conductor? (a) a plastic straw (b) a paper strip (c) a plastic ruler (d) a graphite rod
21. 21.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
22. 22.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
23. 23.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) symbols are heavier (d) to hide the circuit
24. 24.True or false: a traffic signal mainly gives out heat. (a) True (b) False
25. 25.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) a single current path (d) own switch for each bulb
26. 26.Which drawing is the symbol for a capacitor? (a) triangle, bar and arrows (b) triangle against a bar (c) one tall, one short bar (d) two equal parallel lines
27. 27.Which drawing is the symbol for an LED? (a) a circle with an X in it (b) one tall, one short bar (c) triangle, bar and arrows (d) two equal parallel lines
28. 28.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) diode (b) voltmeter (c) LED (d) ammeter
29. 29.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
30. 30.🔋 4 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
31. 31.🔦 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) No (b) Yes
32. 32.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
33. 33.🔘 A bulb and a cell are joined through 5 switches on 5 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?
34. 34.Which of these means the circuit is open? (a) a cell is taken out (b) the loop is complete (c) all wires are joined (d) the switch is ON
35. 35.🔍 Which is the odd one out? (a) a traffic signal (b) a street light (c) a loudspeaker (d) a torch
36. 36.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
37. 37.🔍 Which is the odd one out? (a) a dry cork (b) a rubber eraser (c) a brass key (d) a ceramic cup
38. 38.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
39. 39.Which of these is an insulator? (a) a steel spoon (b) a wooden stick (c) a copper wire (d) a graphite rod
40. 40.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No

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