Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 606 · 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 the bulb is unscrewed? (a) closed (b) open
2. 2.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
3. 3.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
4. 4.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
5. 5.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
6. 6.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
7. 7.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
8. 8.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
10. 10.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
11. 11.True or false: to build with an adult near is safe. (a) True (b) False
12. 12.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) dry your hands first (b) use small battery cells (c) stay away from pylons (d) touch a switch when wet
14. 14.🔋 5 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)? =
15. 15.🔁 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
16. 16.🔋 4 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
18. 18.Which of these is safe? (a) throw cells in a fire (b) poke things in a socket (c) touch a fallen wire (d) build with an adult near
19. 19.True or false: a push button stays where you flip it. (a) True (b) False
20. 20.🔘 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?
21. 21.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is OFF (c) a wire is cut (d) the switch is ON
22. 22.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
23. 23.What does a tilt switch do? (a) flips up or down (b) stays where you flip it (c) slides side to side (d) closes when tipped over
24. 24.True or false: a dry cork is an insulator. (a) False (b) True
25. 25.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) a toaster (b) an electric kettle (c) a rice cooker (d) a tube light
27. 27.Which of these uses electricity? (a) a power station (b) a washing machine (c) a bicycle dynamo (d) a generator
28. 28.Which of these gives us electricity? (a) a refrigerator (b) a generator (c) a computer (d) a washing machine
29. 29.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) only one (d) it does not matter
30. 30.🔋 4 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)? =
31. 31.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
32. 32.True or false: a school bell mainly gives out light. (a) False (b) True
33. 33.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
34. 34.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
35. 35.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) one loose end (d) a broken path
36. 36.True or false: two equal parallel lines is the symbol for a bulb. (a) True (b) False
37. 37.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) a cell is taken out (d) all wires are joined
38. 38.🔍 Which is the odd one out? (a) a brass key (b) a dry cork (c) a ceramic cup (d) a cotton thread
39. 39.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
40. 40.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False

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