Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 82 · 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.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
2. 2.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
3. 3.What does a toggle switch do? (a) works only while pressed (b) closes when tipped over (c) stays where you flip it (d) springs back when let go
4. 4.Which of these mainly makes sound? (a) a doorbell (b) a tube light (c) a traffic signal (d) an exhaust fan
5. 5.True or false: to keep drinks far away is safe. (a) False (b) True
6. 6.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
7. 7.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
8. 8.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
9. 9.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) a broken path (d) one loose end
10. 10.Which of these mainly gives out heat? (a) an electric kettle (b) a street light (c) an electric toy car (d) a siren
11. 11.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is an insulator (c) plastic is a conductor (d) to make them heavy
12. 12.Which drawing is the symbol for a wire? (a) a circle with an X in it (b) a straight line (c) a long and a short line (d) two equal parallel lines
13. 13.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
15. 15.Which of these is an insulator? (a) a brass key (b) a copper wire (c) an iron nail (d) a plastic ruler
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
17. 17.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) own switch for each bulb
18. 18.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
19. 19.Which of these uses electricity? (a) a refrigerator (b) a battery (c) a solar panel (d) a bicycle dynamo
20. 20.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) makes electricity (d) changes the voltage
21. 21.Which of these is a conductor? (a) a rubber band (b) a plastic straw (c) a paper strip (d) aluminium foil
22. 22.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) a straight line (c) a long and a short line (d) triangle, bar and arrows
23. 23.Which drawing is the symbol for a diode? (a) a plain rectangle (b) a straight line (c) triangle against a bar (d) a line lifted at a gap
24. 24.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
25. 25.True or false: a slide switch works only while pressed. (a) False (b) True
26. 26.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) own switch for each bulb (d) used in house wiring
27. 27.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
28. 28.True or false: aluminium foil is an insulator. (a) False (b) True
29. 29.Which of these is not safe? (a) use mains for a project (b) build with an adult near (c) use small battery cells (d) keep drinks far away
30. 30.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a trusted adult (c) a younger child (d) a stranger online
31. 31.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) one bulb out, all go out
32. 32.🔦 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) Yes (b) No
33. 33.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) motor (b) capacitor (c) diode (d) LED
34. 34.Which of these is safe? (a) climb an electric pole (b) fly a kite near wires (c) build with an adult near (d) use a cable with cuts
35. 35.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) movement (c) heat (d) sound
39. 39.Which of these means the circuit is closed? (a) the loop is complete (b) a wire has come loose (c) the switch is OFF (d) the bulb is unscrewed
40. 40.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity

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