Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 413 · 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 brass key a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
3. 3.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) an inverter socket (c) a mains extension board (d) a wall socket
4. 4.Which of these is a conductor? (a) aluminium foil (b) a dry cork (c) a plastic ruler (d) a woollen thread
5. 5.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
6. 6.⚡ What does a doorbell mainly change electricity into? (a) heat (b) movement (c) sound (d) light
7. 7.🔦 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) Yes (b) No
8. 8.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
9. 9.Which of these is safe? (a) touch a switch when wet (b) poke things in a socket (c) keep drinks far away (d) climb an electric pole
10. 10.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
11. 11.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) switch (b) voltmeter (c) bulb (d) motor
12. 12.🔍 Which is the odd one out? (a) use a cable with cuts (b) poke things in a socket (c) stay away from pylons (d) use mains for a project
13. 13.True or false: to throw cells in a fire is safe. (a) True (b) False
14. 14.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
15. 15.True or false: to poke things in a socket is safe. (a) False (b) True
16. 16.True or false: to dry your hands first is not safe. (a) False (b) True
17. 17.Which of these gives us electricity? (a) a television (b) an air conditioner (c) a battery (d) a refrigerator
18. 18.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
19. 19.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
20. 20.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
21. 21.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
22. 22.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
23. 23.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
24. 24.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
25. 25.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a safety pin (d) a ceramic cup
26. 26.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
27. 27.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
30. 30.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
31. 31.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) pull them by the hand (c) wait and watch (d) pour water on them
32. 32.Which of these is not safe? (a) dry your hands first (b) stay away from pylons (c) poke things in a socket (d) keep drinks far away
33. 33.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
34. 34.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
35. 35.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
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.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
38. 38.What does a reed switch do? (a) flips up or down (b) slides side to side (c) closes when tipped over (d) closes near a magnet
39. 39.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a series circuit (d) a closed circuit
40. 40.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit

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