Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 598 · 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.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
2. 2.True or false: an electric iron mainly makes sound. (a) True (b) False
3. 3.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.Which of these is an insulator? (a) an iron nail (b) aluminium foil (c) a plastic straw (d) a safety pin
5. 5.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) double the voltage (d) no voltage
6. 6.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
7. 7.Which of these mainly gives out light? (a) a room heater (b) a traffic signal (c) a water heater (d) an electric drill
8. 8.🔘 A bulb and a cell are joined through 6 switches on 6 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?
9. 9.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
10. 10.Which of these is safe? (a) open a phone charger (b) dry your hands first (c) touch a fallen wire (d) throw cells in a fire
11. 11.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
12. 12.💡 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?
13. 13.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) bulb (c) battery (d) switch
14. 14.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
15. 15.True or false: a brass key is an insulator. (a) True (b) False
16. 16.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) photons (d) water drops
17. 17.True or false: a plastic ruler is an insulator. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly kites in open fields (c) keep drinks far away (d) use mains for a project
19. 19.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
20. 20.Which of these mainly gives out light? (a) a buzzer (b) a tube light (c) a room heater (d) a mixer grinder
21. 21.Which of these mainly gives out heat? (a) a table fan (b) an electric iron (c) a traffic signal (d) a buzzer
22. 22.True or false: a graphite rod is an insulator. (a) False (b) True
23. 23.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the plastic handle (d) the bare end
24. 24.True or false: to open a phone charger is safe. (a) True (b) False
25. 25.💡 5 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?
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
27. 27.What does a slide switch do? (a) works only while pressed (b) stays where you flip it (c) springs back when let go (d) slides side to side
28. 28.Which of these mainly gives out heat? (a) a toaster (b) a table fan (c) an electric drill (d) a torch
29. 29.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
30. 30.💡 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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
31. 31.True or false: a wooden stick is an insulator. (a) True (b) False
32. 32.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
33. 33.True or false: a table fan mainly makes movement. (a) False (b) True
34. 34.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a long and a short line (c) two equal parallel lines (d) triangle, bar and arrows
35. 35.🔌 Most metals are good … (a) batteries (b) insulators (c) conductors (d) magnets only
36. 36.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
37. 37.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
38. 38.True or false: to stay away from pylons is not safe. (a) True (b) False
39. 39.What does a toggle switch do? (a) slides side to side (b) springs back when let go (c) closes near a magnet (d) stays where you flip it
40. 40.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a bulb (d) a long wire

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