Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 628 · 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: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
2. 2.Which of these gives us electricity? (a) a television (b) a bicycle dynamo (c) a computer (d) a water pump
3. 3.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
4. 4.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
5. 5.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
6. 6.Which of these mainly gives out light? (a) a room heater (b) a doorbell (c) a tube light (d) a buzzer
7. 7.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) a full circuit (d) an open circuit
8. 8.🔍 Which is the odd one out? (a) a steel coin (b) a paper strip (c) a rubber eraser (d) a rubber band
9. 9.🔘 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
10. 10.True or false: to stay away from pylons is safe. (a) True (b) False
11. 11.🔘 When a switch is ON, the circuit is … (a) closed (b) cut (c) broken (d) open
12. 12.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
13. 13.🔘 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) No (b) Yes
14. 14.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.True or false: two or more cell symbols is the symbol for a voltmeter. (a) True (b) False
18. 18.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) opens or closes the loop (d) changes the voltage
19. 19.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
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 OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
21. 21.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
22. 22.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.Which of these is an insulator? (a) a brass key (b) a ceramic cup (c) aluminium foil (d) an iron nail
24. 24.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
25. 25.Which of these is an insulator? (a) aluminium foil (b) a safety pin (c) a plastic straw (d) a steel coin
26. 26.True or false: a dot where wires meet is the symbol for a voltmeter. (a) True (b) False
27. 27.Which of these mainly makes movement? (a) an electric iron (b) a rice cooker (c) an exhaust fan (d) a school bell
28. 28.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
29. 29.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
32. 32.🔋 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)? =
33. 33.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a push button (c) a slide switch (d) a tilt switch
34. 34.Which of these is not safe? (a) take cells out after use (b) use small battery cells (c) build with an adult near (d) fly a kite near wires
35. 35.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) motor (c) resistor (d) cell
36. 36.🔦 A circuit has a used-up (dead) 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 brass key. Does the bulb glow? (a) No (b) Yes
37. 37.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
38. 38.🔍 Which is the odd one out? (a) take cells out after use (b) build with an adult near (c) stay away from pylons (d) touch a fallen wire
39. 39.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
40. 40.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =

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