Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 14 · 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.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
2. 2.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
3. 3.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
4. 4.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
5. 5.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) water carries current (d) it is just untidy
6. 6.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.True or false: a rubber band is an insulator. (a) False (b) True
8. 8.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) used in house wiring (d) one bulb out, all go out
9. 9.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
10. 10.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) throw cells in a fire (b) build with an adult near (c) keep drinks far away (d) dry your hands first
12. 12.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
13. 13.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
14. 14.🔍 Which is the odd one out? (a) stay away from pylons (b) use small battery cells (c) poke things in a socket (d) build with an adult near
15. 15.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) friction (d) a magnet
16. 16.True or false: to stay away from pylons is not safe. (a) True (b) False
17. 17.Which of these gives us electricity? (a) a cell (b) a television (c) a water pump (d) a mobile phone
18. 18.💡 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
19. 19.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a stranger online (d) a trusted adult
20. 20.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
21. 21.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
22. 22.True or false: a push button springs back when let go. (a) False (b) True
23. 23.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a closed circuit (c) a series circuit (d) a full circuit
24. 24.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) all wires are joined (c) the switch is OFF (d) a cell is taken out
25. 25.🔋 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)? =
26. 26.True or false: one tall, one short bar is the symbol for a battery. (a) False (b) True
27. 27.True or false: a tilt switch closes near a magnet. (a) False (b) True
28. 28.True or false: to fly a kite near wires is not safe. (a) True (b) False
29. 29.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) resistor (b) switch (c) LED (d) battery
31. 31.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
33. 33.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) light (c) movement (d) sound
34. 34.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.💡 6 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?
36. 36.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
37. 37.🔍 Which is the odd one out? (a) take cells out after use (b) climb an electric pole (c) throw cells in a fire (d) touch a switch when wet
38. 38.True or false: a plastic ruler is an insulator. (a) False (b) True
39. 39.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe

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