Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 202 · 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 light? (a) an electric toy car (b) a buzzer (c) a torch (d) a table fan
2. 2.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a toggle switch
3. 3.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
4. 4.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
5. 5.Which of these gives us electricity? (a) a television (b) a mobile phone (c) a water pump (d) a cell
6. 6.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) in parallel (d) by Wi-Fi
7. 7.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a safe circuit (c) a parallel circuit (d) a short circuit
8. 8.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
9. 9.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
10. 10.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are ON (c) when both are OFF (d) never
11. 11.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
12. 12.True or false: “a single current path” is true of a series circuit. (a) True (b) False
13. 13.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
15. 15.True or false: a loudspeaker mainly gives out light. (a) False (b) True
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
17. 17.🔋 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)? =
18. 18.Which of these means the circuit is open? (a) the switch is ON (b) the bulb is unscrewed (c) the loop is complete (d) all wires are joined
19. 19.True or false: a straight line is the symbol for a wire. (a) False (b) True
20. 20.True or false: a circle with a cross is the symbol for a resistor. (a) True (b) False
21. 21.True or false: to fly a kite near wires is not safe. (a) True (b) False
22. 22.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
23. 23.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 12 V (d) 9 V
24. 24.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) each gets the full volts
25. 25.🔍 Which is the odd one out? (a) a wooden stick (b) a metal paper clip (c) aluminium foil (d) a graphite rod
26. 26.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a wall socket (c) an inverter socket (d) a mains extension board
27. 27.Which drawing is the symbol for a voltmeter? (a) a straight line (b) a circle with V inside (c) a plain rectangle (d) a dot where wires meet
28. 28.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
29. 29.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
30. 30.Which of these is safe? (a) stop if a part gets hot (b) use a cable with cuts (c) fly a kite near wires (d) use mains for a project
31. 31.Which of these mainly makes movement? (a) a siren (b) an electric iron (c) a night lamp (d) an exhaust fan
32. 32.Which drawing is the symbol for a wire? (a) a circle with a cross (b) a straight line (c) a line lifted at a gap (d) a small empty box
33. 33.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 6 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
34. 34.Which of these gives us electricity? (a) a mobile phone (b) a washing machine (c) a bicycle dynamo (d) a television
35. 35.🔘 Which kind of switch closes when tipped over? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a reed switch
36. 36.Which of these means the circuit is closed? (a) a wire has come loose (b) a wire is cut (c) the bulb is unscrewed (d) all wires are joined
37. 37.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) switch (b) resistor (c) battery (d) wire
38. 38.Which of these is safe? (a) throw cells in a fire (b) poke things in a socket (c) take cells out after use (d) climb an electric pole
39. 39.True or false: to stop if a part gets hot is safe. (a) True (b) False
40. 40.🔦 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) Yes (b) No

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