Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 959 · 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.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
4. 4.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a reed switch (d) a tilt switch
5. 5.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
6. 6.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) wavy lines (d) little stars
7. 7.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
8. 8.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) one out, the rest glow (d) each gets the full volts
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No
10. 10.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are ON (d) when both are OFF
11. 11.True or false: a toaster mainly gives out heat. (a) True (b) False
12. 12.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
13. 13.Which of these mainly gives out heat? (a) a water heater (b) an exhaust fan (c) a buzzer (d) a doorbell
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
15. 15.Which of these is not safe? (a) fly kites in open fields (b) use small battery cells (c) stop if a part gets hot (d) touch a switch when wet
16. 16.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
17. 17.Which of these is an insulator? (a) a graphite rod (b) a glass marble (c) aluminium foil (d) a metal paper clip
18. 18.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
20. 20.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
21. 21.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
22. 22.Which drawing is the symbol for a switch? (a) a long and a short line (b) a line lifted at a gap (c) two equal parallel lines (d) a circle with A inside
23. 23.True or false: a rubber band is a conductor. (a) False (b) True
24. 24.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the base (c) the glass (d) the switch
25. 25.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) wait and watch (d) shout for an adult
26. 26.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.Which of these mainly makes movement? (a) a school bell (b) a toaster (c) an electric drill (d) a doorbell
28. 28.What does a tilt switch do? (a) closes when tipped over (b) works only while pressed (c) closes near a magnet (d) slides side to side
29. 29.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) one bulb out, all go out (d) used in house wiring
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. Does the bulb glow? (a) No (b) Yes
31. 31.True or false: aluminium foil is an insulator. (a) False (b) True
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.🔍 Which is the odd one out? (a) use a cable with cuts (b) fly a kite near wires (c) stop if a part gets hot (d) throw cells in a fire
34. 34.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
35. 35.🔍 Which is the odd one out? (a) take cells out after use (b) throw cells in a fire (c) use a cable with cuts (d) poke things in a socket
36. 36.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
37. 37.Which of these mainly makes movement? (a) a buzzer (b) a table fan (c) an LED lamp (d) an electric iron
38. 38.True or false: many long-short pairs is the symbol for a diode. (a) True (b) False
39. 39.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
40. 40.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe

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