Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 948 · 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 a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.True or false: to open a phone charger is safe. (a) False (b) True
3. 3.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) chemical energy (d) sound energy
4. 4.🔍 Which is the odd one out? (a) aluminium foil (b) a plastic ruler (c) a brass key (d) a steel spoon
5. 5.🔘 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?
6. 6.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
7. 7.Which of these is safe? (a) climb an electric pole (b) throw cells in a fire (c) keep drinks far away (d) use mains for a project
8. 8.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
9. 9.Which of these gives us electricity? (a) a refrigerator (b) a battery (c) a mobile phone (d) a water pump
10. 10.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
11. 11.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) never (c) only when both are OFF (d) only when both are ON
12. 12.🔦 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) No (b) Yes
13. 13.🔘 Which kind of switch works only while pressed? (a) a push button (b) a toggle switch (c) a reed switch (d) a slide switch
14. 14.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it is just untidy (c) water carries current (d) it spoils the paint
15. 15.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
16. 16.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
20. 20.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) the shorter line (d) both lines
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
23. 23.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
24. 24.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
25. 25.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
26. 26.⚡ What does a toaster mainly change electricity into? (a) sound (b) movement (c) heat (d) light
27. 27.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) build with an adult near (b) stay away from pylons (c) fly kites in open fields (d) fly a kite near wires
29. 29.Which of these is not safe? (a) take cells out after use (b) use a cable with cuts (c) build with an adult near (d) stay away from pylons
30. 30.Which of these is an insulator? (a) aluminium foil (b) a wooden stick (c) a steel spoon (d) a graphite rod
31. 31.💡 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?
32. 32.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
33. 33.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a tilt switch (c) a slide switch (d) a reed switch
34. 34.True or false: a steel coin is a conductor. (a) True (b) False
35. 35.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
36. 36.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) a cell is taken out (d) a wire is cut
37. 37.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
38. 38.True or false: a mixer grinder mainly makes movement. (a) False (b) True
39. 39.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
40. 40.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) an open circuit (d) a short circuit

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