Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 263 · 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.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
2. 2.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
3. 3.🔍 Which is the odd one out? (a) keep drinks far away (b) take cells out after use (c) open a phone charger (d) stay away from pylons
4. 4.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
5. 5.💡 4 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?
6. 6.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
7. 7.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
8. 8.🔦 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
9. 9.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) cut them open (d) bury them in soil
10. 10.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) both lines (d) the shorter line
11. 11.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
12. 12.True or false: a school bell mainly makes movement. (a) False (b) True
13. 13.🔋 8 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)? =
14. 14.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) used in house wiring (d) many paths for current
15. 15.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.Which of these mainly gives out light? (a) a doorbell (b) an LED lamp (c) a table fan (d) an electric toy car
17. 17.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
18. 18.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a wire has come loose (d) the loop is complete
19. 19.Which of these uses electricity? (a) a cell (b) a water pump (c) a solar panel (d) a bicycle dynamo
20. 20.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
21. 21.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
22. 22.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
23. 23.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
24. 24.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
25. 25.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
28. 28.Which of these is not safe? (a) use a cable with cuts (b) stop if a part gets hot (c) stay away from pylons (d) dry your hands first
29. 29.True or false: a push button closes when tipped over. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) fly kites in open fields (b) poke things in a socket (c) stop if a part gets hot (d) use small battery cells
31. 31.Which of these is safe? (a) use mains for a project (b) fly kites in open fields (c) open a phone charger (d) touch a switch when wet
32. 32.Which drawing is the symbol for a bulb? (a) two equal parallel lines (b) one tall, one short bar (c) a circle with A inside (d) a circle with a cross
33. 33.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
34. 34.🔋 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)? =
35. 35.What does a tilt switch do? (a) works only while pressed (b) stays where you flip it (c) closes near a magnet (d) closes when tipped over
36. 36.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
38. 38.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
39. 39.🔦 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
40. 40.Which of these is not safe? (a) stay away from pylons (b) build with an adult near (c) dry your hands first (d) touch a fallen wire

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