Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 400 · 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.🔦 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
2. 2.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
3. 3.Which of these mainly makes sound? (a) a torch (b) a room heater (c) a tube light (d) a loudspeaker
4. 4.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.🔍 Which is the odd one out? (a) fly kites in open fields (b) throw cells in a fire (c) fly a kite near wires (d) climb an electric pole
6. 6.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the switch (d) the base
8. 8.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
9. 9.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
10. 10.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
11. 11.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
13. 13.💡 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?
14. 14.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
16. 16.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is OFF (c) a wire has come loose (d) the loop is complete
17. 17.True or false: a circle with A inside is the symbol for an LED. (a) False (b) True
18. 18.🔦 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
19. 19.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) bulb (b) wire (c) LED (d) ammeter
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.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
22. 22.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the bulb is unscrewed
23. 23.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
24. 24.Which of these is an insulator? (a) a copper wire (b) a ceramic cup (c) a metal paper clip (d) a graphite rod
25. 25.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a smaller voltage (d) a bigger voltage
26. 26.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) plastic (d) glass
27. 27.💡 4 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?
28. 28.🔋 4 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
29. 29.🔍 Which is the odd one out? (a) a wooden stick (b) a glass marble (c) a paper strip (d) a safety pin
30. 30.True or false: a doorbell mainly makes movement. (a) True (b) False
31. 31.Which of these is not safe? (a) take cells out after use (b) build with an adult near (c) keep drinks far away (d) throw cells in a fire
32. 32.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
33. 33.Which of these mainly gives out heat? (a) a ceiling fan (b) a buzzer (c) a doorbell (d) an electric kettle
34. 34.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
36. 36.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
37. 37.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
38. 38.🔌 Most metals are good … (a) batteries (b) conductors (c) insulators (d) magnets only
39. 39.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.Which of these is a conductor? (a) a glass marble (b) a plastic straw (c) a plastic ruler (d) a brass key

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