Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 103 · 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: a long and a short line is the symbol for a cell. (a) True (b) False
2. 2.True or false: a table fan mainly makes movement. (a) True (b) False
3. 3.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
4. 4.🔋 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)? =
5. 5.Which drawing is the symbol for a switch? (a) a circle with an X in it (b) a plain rectangle (c) a line lifted at a gap (d) a circle with V inside
6. 6.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) Yes (b) No
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
8. 8.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
9. 9.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
11. 11.True or false: to use mains for a project is not safe. (a) False (b) True
12. 12.True or false: a wooden stick is a conductor. (a) True (b) False
13. 13.⚡ What does an exhaust fan mainly change electricity into? (a) movement (b) sound (c) light (d) heat
14. 14.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
15. 15.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
16. 16.What does a toggle switch do? (a) closes when tipped over (b) works only while pressed (c) stays where you flip it (d) closes near a magnet
17. 17.🔦 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 graphite rod. Does the bulb glow? (a) Yes (b) No
18. 18.True or false: to climb an electric pole is safe. (a) False (b) True
19. 19.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
20. 20.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
21. 21.💡 3 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 2 are taken out of their holders. How many bulbs glow?
22. 22.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
23. 23.True or false: one tall, one short bar is the symbol for an ammeter. (a) True (b) False
24. 24.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) each gets the full volts (c) a break stops every bulb (d) one bulb out, all go out
25. 25.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the shorter line (d) the longer line
26. 26.True or false: a ceiling fan mainly makes movement. (a) False (b) True
27. 27.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.True or false: a loudspeaker mainly makes sound. (a) False (b) True
30. 30.True or false: a glass marble is a conductor. (a) True (b) False
31. 31.⚡ What does a night lamp mainly change electricity into? (a) heat (b) sound (c) light (d) movement
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) Yes (b) No
34. 34.🔍 Which is the odd one out? (a) build with an adult near (b) fly kites in open fields (c) stop if a part gets hot (d) fly a kite near wires
35. 35.🔍 Which is the odd one out? (a) keep drinks far away (b) dry your hands first (c) build with an adult near (d) climb an electric pole
36. 36.True or false: a siren mainly gives out light. (a) False (b) True
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) diode (b) capacitor (c) bulb (d) cell
38. 38.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series

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