Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 223 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
2. 2.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
3. 3.True or false: to use mains for a project is safe. (a) True (b) False
4. 4.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) Yes (b) No
5. 5.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
7. 7.Which of these is not safe? (a) dry your hands first (b) build with an adult near (c) fly kites in open fields (d) open a phone charger
8. 8.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) bulb (b) resistor (c) junction (d) cell
9. 9.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
10. 10.True or false: a graphite rod is a conductor. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a toaster (b) an electric iron (c) a room heater (d) a traffic signal
12. 12.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
13. 13.True or false: a steel coin is an insulator. (a) False (b) True
14. 14.Which of these means the circuit is closed? (a) all wires are joined (b) a wire has come loose (c) the bulb is unscrewed (d) a cell is taken out
15. 15.Which drawing is the symbol for a bulb? (a) a long and a short line (b) a circle with a cross (c) many long-short pairs (d) a circle with M inside
16. 16.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) many paths for current (d) a single current path
17. 17.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
18. 18.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
19. 19.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) a safe circuit (d) an open circuit
20. 20.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
21. 21.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
22. 22.💡 5 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 5 is taken out of its holder. How many bulbs glow?
23. 23.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
24. 24.Which of these mainly gives out light? (a) an electric kettle (b) an electric iron (c) a rice cooker (d) a night lamp
25. 25.💡 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) brighter (c) dimmer
26. 26.Which drawing is the symbol for an LED? (a) triangle against a bar (b) two or more cell symbols (c) a dot where wires meet (d) triangle, bar and arrows
27. 27.🔍 Which is the odd one out? (a) touch a switch when wet (b) take cells out after use (c) build with an adult near (d) stay away from pylons
28. 28.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
29. 29.What does a slide switch do? (a) slides side to side (b) springs back when let go (c) works only while pressed (d) closes near a magnet
30. 30.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
31. 31.What does a tilt switch do? (a) stays where you flip it (b) springs back when let go (c) closes when tipped over (d) flips up or down
32. 32.Which of these mainly makes movement? (a) an LED lamp (b) an electric iron (c) a night lamp (d) an electric drill
33. 33.🔍 Which is the odd one out? (a) a plastic straw (b) a plastic ruler (c) a graphite rod (d) a wooden stick
34. 34.True or false: an electric iron mainly gives out light. (a) True (b) False
35. 35.💡 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. All the bulbs are in place. How many bulbs glow?
36. 36.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
37. 37.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
38. 38.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) one bulb out, all go out (d) a break stops every bulb
39. 39.⚠️ 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
40. 40.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =

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