Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 114 · 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.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) never (d) only when both are OFF
2. 2.True or false: a wooden stick is a conductor. (a) True (b) False
3. 3.Which of these is an insulator? (a) a rubber band (b) a copper wire (c) a graphite rod (d) a steel coin
4. 4.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) own switch for each bulb
5. 5.🔦 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
6. 6.Which of these is safe? (a) touch a fallen wire (b) keep drinks far away (c) climb an electric pole (d) poke things in a socket
7. 7.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
8. 8.💡 4 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 2 and 3 are taken out of their holders. How many bulbs glow?
9. 9.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
10. 10.True or false: to keep drinks far away is safe. (a) False (b) True
11. 11.Which of these mainly gives out heat? (a) a water heater (b) a street light (c) an LED lamp (d) a siren
12. 12.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
13. 13.True or false: a push button flips up or down. (a) True (b) False
14. 14.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) cut (d) broken
15. 15.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a kind of bulb (d) a switch with a lid
16. 16.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
17. 17.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a brass key (d) a wooden stick
18. 18.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
19. 19.🔍 Which is the odd one out? (a) a siren (b) a doorbell (c) a mixer grinder (d) a loudspeaker
20. 20.💡 A battery lights 5 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
21. 21.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) cell (b) bulb (c) voltmeter (d) wire
22. 22.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) two equal parallel lines (c) a circle with V inside (d) a plain rectangle
23. 23.True or false: a tilt switch slides side to side. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) open a phone charger (b) build with an adult near (c) touch a switch when wet (d) fly a kite near wires
25. 25.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
26. 26.🔋 2 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)? =
27. 27.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) a single current path (d) used in house wiring
28. 28.🔍 Which is the odd one out? (a) aluminium foil (b) a glass marble (c) a steel coin (d) a copper wire
29. 29.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) battery (c) LED (d) capacitor
30. 30.🔍 Which is the odd one out? (a) a loudspeaker (b) a street light (c) a doorbell (d) a siren
31. 31.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
32. 32.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
33. 33.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
34. 34.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
35. 35.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
36. 36.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
37. 37.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a toggle switch
38. 38.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) nobody (c) a stranger online (d) a trusted adult
39. 39.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
40. 40.💡 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?

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids