Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 416 · 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.🔋 How many 1.5 V cells must be joined in series to give 6 V?
2. 2.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.True or false: to build with an adult near is not safe. (a) True (b) False
4. 4.Which of these mainly gives out light? (a) a buzzer (b) an exhaust fan (c) a traffic signal (d) a rice cooker
5. 5.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
6. 6.True or false: a straight line is the symbol for an ammeter. (a) True (b) False
7. 7.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
9. 9.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
11. 11.Which of these is not safe? (a) take cells out after use (b) keep drinks far away (c) use mains for a project (d) use small battery cells
12. 12.🔍 Which is the odd one out? (a) a torch (b) a doorbell (c) a school bell (d) a siren
13. 13.⚡ What does a school bell mainly change electricity into? (a) movement (b) sound (c) heat (d) light
14. 14.💡 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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
15. 15.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) throw cells in a fire (b) touch a fallen wire (c) take cells out after use (d) climb an electric pole
18. 18.Which of these mainly gives out light? (a) a loudspeaker (b) a school bell (c) a street light (d) a table fan
19. 19.Which drawing is the symbol for a bulb? (a) a small empty box (b) a line lifted at a gap (c) a circle with A inside (d) a circle with an X in it
20. 20.True or false: aluminium foil is a conductor. (a) True (b) False
21. 21.Which drawing is the symbol for a voltmeter? (a) two or more cell symbols (b) a circle with V inside (c) a circle with A inside (d) triangle, bar and arrows
22. 22.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
23. 23.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
24. 24.True or false: a small empty box is the symbol for a motor. (a) True (b) False
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
26. 26.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
27. 27.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
28. 28.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
29. 29.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) No (b) Yes
31. 31.Which of these mainly makes sound? (a) a mixer grinder (b) a school bell (c) a toaster (d) a water heater
32. 32.Which of these is not safe? (a) keep drinks far away (b) use small battery cells (c) open a phone charger (d) fly kites in open fields
33. 33.🔍 Which is the odd one out? (a) open a phone charger (b) climb an electric pole (c) touch a fallen wire (d) keep drinks far away
34. 34.True or false: a push button works only while pressed. (a) True (b) False
35. 35.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) capacitor (c) voltmeter (d) switch
36. 36.Which of these is safe? (a) throw cells in a fire (b) use mains for a project (c) touch a switch when wet (d) use small battery cells
37. 37.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
38. 38.Which of these is a conductor? (a) a woollen thread (b) a plastic ruler (c) an iron nail (d) a ceramic cup
39. 39.💡 A battery lights 3 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
40. 40.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb

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