Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 148 · 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.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
2. 2.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.True or false: an iron nail is an insulator. (a) True (b) False
4. 4.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a complete loop (d) a broken path
5. 5.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
6. 6.💡 4 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?
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
8. 8.Which of these is a conductor? (a) a ceramic cup (b) a steel coin (c) a plastic ruler (d) a cotton thread
9. 9.True or false: to climb an electric pole is not safe. (a) True (b) False
10. 10.Which of these uses electricity? (a) a power station (b) a wind turbine (c) a bicycle dynamo (d) a mobile phone
11. 11.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
12. 12.💡 2 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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
13. 13.🔋 7 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.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
15. 15.True or false: to keep drinks far away is safe. (a) False (b) True
16. 16.Which of these is an insulator? (a) a dry cork (b) a graphite rod (c) an iron nail (d) aluminium foil
17. 17.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
18. 18.💡 5 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 3 and 5 are taken out of their holders. How many bulbs glow?
19. 19.🔍 Which is the odd one out? (a) a graphite rod (b) a plastic ruler (c) a steel coin (d) a steel spoon
20. 20.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
21. 21.🔍 Which is the odd one out? (a) a wooden stick (b) a metal paper clip (c) a graphite rod (d) a safety pin
22. 22.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
23. 23.Which of these is an insulator? (a) a steel coin (b) a metal paper clip (c) a rubber band (d) a copper wire
24. 24.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) pull them by the hand (c) wait and watch (d) shout for an adult
25. 25.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
26. 26.🔍 Which is the odd one out? (a) a siren (b) an electric toy car (c) a school bell (d) a buzzer
27. 27.True or false: a rice cooker mainly gives out light. (a) False (b) True
28. 28.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
29. 29.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are OFF (c) never (d) only when both are ON
30. 30.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
31. 31.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) Yes (b) No
32. 32.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
33. 33.🔍 Which is the odd one out? (a) use a cable with cuts (b) build with an adult near (c) climb an electric pole (d) touch a switch when wet
34. 34.True or false: a circle with an X in it is the symbol for an ammeter. (a) True (b) False
35. 35.Which of these is safe? (a) open a phone charger (b) throw cells in a fire (c) take cells out after use (d) use a cable with cuts
36. 36.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
38. 38.Which of these is safe? (a) poke things in a socket (b) use a cable with cuts (c) fly a kite near wires (d) use small battery cells
39. 39.What does a slide switch do? (a) works only while pressed (b) closes near a magnet (c) slides side to side (d) closes when tipped over
40. 40.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a push button (c) a tilt switch (d) a slide switch

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