Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 394 · 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.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) a single current path (d) each gets the full volts
2. 2.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
4. 4.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
5. 5.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
6. 6.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) a ceramic cup (b) a glass marble (c) a brass key (d) a woollen thread
8. 8.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
9. 9.🔦 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
10. 10.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
11. 11.Which of these is an insulator? (a) a metal paper clip (b) a safety pin (c) a cotton thread (d) aluminium foil
12. 12.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
13. 13.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
14. 14.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
15. 15.What does a push button do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) springs back when let go
16. 16.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
17. 17.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.Which of these mainly gives out light? (a) a water heater (b) a room heater (c) a torch (d) an electric toy car
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) cell (b) wire (c) LED (d) motor
20. 20.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
21. 21.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
23. 23.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) battery (b) ammeter (c) motor (d) voltmeter
24. 24.🔋 5 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)? =
25. 25.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
26. 26.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
27. 27.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the switch is OFF
28. 28.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
29. 29.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a plain rectangle (c) many long-short pairs (d) a circle with M inside
30. 30.Which of these is an insulator? (a) a copper wire (b) a metal paper clip (c) a dry cork (d) a steel coin
31. 31.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
32. 32.💡 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?
33. 33.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) a closed circuit (d) an open circuit
34. 34.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
35. 35.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
36. 36.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
37. 37.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 12 V (d) 9 V
38. 38.What does a reed switch do? (a) stays where you flip it (b) closes near a magnet (c) flips up or down (d) springs back when let go
39. 39.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
40. 40.⚡ What does a torch mainly change electricity into? (a) sound (b) heat (c) light (d) movement

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