Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 469 · 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.Which of these mainly gives out heat? (a) a ceiling fan (b) an electric iron (c) a table fan (d) a tube light
2. 2.Which of these is an insulator? (a) a steel coin (b) a copper wire (c) aluminium foil (d) a cotton thread
3. 3.What does a push button do? (a) closes near a magnet (b) flips up or down (c) springs back when let go (d) slides side to side
4. 4.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
5. 5.🔋 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)? =
6. 6.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
7. 7.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) voltmeter (b) motor (c) switch (d) bulb
8. 8.🔋 How many 2 V cells must be joined in series to give 14 V?
9. 9.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
10. 10.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
11. 11.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
12. 12.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) capacitor (c) wire (d) switch
14. 14.Which of these is safe? (a) poke things in a socket (b) open a phone charger (c) build with an adult near (d) throw cells in a fire
15. 15.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
16. 16.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
18. 18.🔋 7 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)? =
19. 19.True or false: to stop if a part gets hot is not safe. (a) False (b) True
20. 20.What does a push button do? (a) closes near a magnet (b) works only while pressed (c) closes when tipped over (d) stays where you flip it
21. 21.Which of these gives us electricity? (a) a battery (b) a water pump (c) a mobile phone (d) a refrigerator
22. 22.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
23. 23.Which of these is a conductor? (a) a rubber eraser (b) a copper wire (c) a dry cork (d) a rubber band
24. 24.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) plastic (d) rubber
25. 25.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are ON (c) when either is ON (d) only when both are OFF
26. 26.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) resistor (c) motor (d) capacitor
27. 27.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.🔘 What does a switch do in a circuit? (a) stores current (b) opens or closes the loop (c) changes the voltage (d) makes electricity
29. 29.🔍 Which is the odd one out? (a) a copper wire (b) a rubber eraser (c) a steel coin (d) an iron nail
30. 30.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) triangle against a bar (c) a long and a short line (d) a circle with A inside
31. 31.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) sound (c) electric current (d) a magnet
32. 32.🔍 Which is the odd one out? (a) stay away from pylons (b) poke things in a socket (c) fly a kite near wires (d) climb an electric pole
33. 33.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
34. 34.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: a small empty box is the symbol for a battery. (a) True (b) False
36. 36.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
37. 37.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
38. 38.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a short circuit (d) a safe circuit
39. 39.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔦 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 steel coin. Does the bulb glow? (a) Yes (b) No

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