Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 887 · 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.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a long wire (d) a bulb
2. 2.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pull them by the hand (c) pour water on them (d) shout for an adult
3. 3.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔋 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)? =
5. 5.🔦 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
6. 6.Which of these mainly makes movement? (a) a ceiling fan (b) a water heater (c) a night lamp (d) an electric iron
7. 7.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
8. 8.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
9. 9.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) one bulb out, all go out (d) each gets the full volts
10. 10.🔍 Which is the odd one out? (a) a dry cork (b) a brass key (c) a steel spoon (d) a steel coin
11. 11.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
12. 12.True or false: to build with an adult near is safe. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) fly a kite near wires (b) keep drinks far away (c) stay away from pylons (d) use small battery cells
14. 14.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔍 Which is the odd one out? (a) keep drinks far away (b) use small battery cells (c) climb an electric pole (d) fly kites in open fields
16. 16.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
17. 17.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
18. 18.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) rubber (d) plastic
19. 19.True or false: a small empty box is the symbol for a diode. (a) False (b) True
20. 20.🔋 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)? =
21. 21.Which of these is true of a series circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) many paths for current (d) own switch for each bulb
22. 22.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) many paths for current (d) a break stops every bulb
23. 23.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) switch (c) capacitor (d) motor
25. 25.🔋 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)? =
26. 26.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) No (b) Yes
29. 29.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) double the voltage (d) the same voltage
30. 30.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.True or false: an electric kettle mainly gives out heat. (a) False (b) True
32. 32.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a wire has come loose (d) all wires are joined
33. 33.Which of these is a conductor? (a) a rubber band (b) a woollen thread (c) a wooden stick (d) a safety pin
34. 34.🔍 Which is the odd one out? (a) a graphite rod (b) a brass key (c) a rubber eraser (d) a copper wire
35. 35.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
36. 36.True or false: triangle against a bar is the symbol for a switch. (a) True (b) False
37. 37.🔋 How many 2 V cells must be joined in series to give 6 V?
38. 38.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
39. 39.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)

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