Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 549 · 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 is the odd one out? (a) fly kites in open fields (b) poke things in a socket (c) take cells out after use (d) stop if a part gets hot
2. 2.🔋 How many 2 V cells must be joined in series to give 16 V?
3. 3.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
4. 4.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) little stars (d) wavy lines
5. 5.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
6. 6.Which of these is an insulator? (a) a brass key (b) a steel spoon (c) an iron nail (d) a rubber eraser
7. 7.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.What does a reed switch do? (a) closes near a magnet (b) flips up or down (c) closes when tipped over (d) works only while pressed
9. 9.🔍 Which is the odd one out? (a) use a cable with cuts (b) build with an adult near (c) fly a kite near wires (d) poke things in a socket
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
11. 11.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
12. 12.True or false: a long and a short line is the symbol for a resistor. (a) False (b) True
13. 13.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
14. 14.⚡ What does a night lamp mainly change electricity into? (a) movement (b) heat (c) sound (d) light
15. 15.Which of these uses electricity? (a) a cell (b) a water pump (c) a generator (d) a solar panel
16. 16.🔍 Which is the odd one out? (a) a wooden stick (b) a safety pin (c) aluminium foil (d) a copper wire
17. 17.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
18. 18.💡 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. How many bulbs glow?
19. 19.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.🔘 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
22. 22.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
23. 23.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.Which of these mainly makes movement? (a) a room heater (b) a night lamp (c) an exhaust fan (d) an LED lamp
25. 25.Which drawing is the symbol for a cell? (a) a circle with a cross (b) a circle with A inside (c) one tall, one short bar (d) a circle with V inside
26. 26.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) give them for recycling (d) throw them in a fire
27. 27.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
28. 28.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a complete loop (d) a plastic gap
29. 29.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
31. 31.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) used in house wiring (c) a break stops every bulb (d) a single current path
32. 32.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) a single current path (d) many paths for current
33. 33.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
34. 34.🔍 Which is the odd one out? (a) a night lamp (b) a buzzer (c) a siren (d) a school bell
35. 35.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
36. 36.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
37. 37.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) open (d) cut
38. 38.Which of these is safe? (a) open a phone charger (b) touch a switch when wet (c) dry your hands first (d) touch a fallen wire
39. 39.Which of these is not safe? (a) use small battery cells (b) keep drinks far away (c) take cells out after use (d) use a cable with cuts
40. 40.⚡ What does an electric iron mainly change electricity into? (a) sound (b) heat (c) light (d) movement

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