Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 862 · 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: to throw cells in a fire is not safe. (a) False (b) True
2. 2.True or false: a safety pin is an insulator. (a) False (b) True
3. 3.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a toggle switch
4. 4.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) diode (c) motor (d) cell
5. 5.True or false: a plain rectangle is the symbol for a battery. (a) True (b) False
6. 6.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
7. 7.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
8. 8.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
9. 9.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
10. 10.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 0.5 V (d) 1.5 V
11. 11.Which of these is a conductor? (a) a rubber band (b) a wooden stick (c) aluminium foil (d) a rubber eraser
12. 12.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) no voltage (d) a bigger voltage
13. 13.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
14. 14.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
15. 15.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a push button (c) a reed switch (d) a slide switch
16. 16.True or false: to build with an adult near is not safe. (a) False (b) True
17. 17.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
18. 18.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
19. 19.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) a single current path (d) each gets the full volts
20. 20.Which of these is not safe? (a) build with an adult near (b) stay away from pylons (c) fly kites in open fields (d) open a phone charger
21. 21.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
22. 22.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
23. 23.🔦 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
24. 24.🔋 How many 3 V cells must be joined in series to give 6 V?
25. 25.💡 3 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 2 and 3 are taken out of their holders. How many bulbs glow?
26. 26.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
27. 27.Which of these uses electricity? (a) a mobile phone (b) a battery (c) a solar panel (d) a bicycle dynamo
28. 28.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) an open circuit (c) a closed circuit (d) a series circuit
29. 29.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
30. 30.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) one loose end (d) a plastic gap
31. 31.True or false: a metal paper clip is a conductor. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a street light (b) an electric kettle (c) a torch (d) a traffic signal
33. 33.🔌 Most metals are good … (a) insulators (b) batteries (c) magnets only (d) conductors
34. 34.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
35. 35.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
36. 36.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
37. 37.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) light (c) heat (d) sound
38. 38.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) junction (b) capacitor (c) resistor (d) ammeter
39. 39.Which of these is safe? (a) touch a fallen wire (b) keep drinks far away (c) open a phone charger (d) use mains for a project
40. 40.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a stranger online (c) a younger child (d) a trusted adult

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