Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 28 · 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: to stay away from pylons is not safe. (a) False (b) True
2. 2.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
4. 4.Which of these is not safe? (a) touch a switch when wet (b) build with an adult near (c) use small battery cells (d) dry your hands first
5. 5.Which of these mainly makes movement? (a) a water heater (b) a mixer grinder (c) a torch (d) a tube light
6. 6.Which drawing is the symbol for a capacitor? (a) a long and a short line (b) two equal parallel lines (c) a circle with M inside (d) a line lifted at a gap
7. 7.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
8. 8.🔦 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 steel spoon. Does the bulb glow? (a) No (b) Yes
9. 9.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
10. 10.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) No (b) Yes
11. 11.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) a bigger voltage (d) no voltage
12. 12.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) a safety pin (d) a plastic straw
13. 13.✏️ In a circuit diagram, which part is drawn as a straight line? (a) cell (b) battery (c) wire (d) ammeter
14. 14.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) electric current (d) a magnet
15. 15.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
16. 16.True or false: a metal paper clip is an insulator. (a) False (b) True
17. 17.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) a stranger online (d) nobody
18. 18.True or false: a circle with a cross is the symbol for a resistor. (a) False (b) True
19. 19.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
20. 20.Which of these mainly makes sound? (a) a table fan (b) a tube light (c) a loudspeaker (d) a traffic signal
21. 21.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
22. 22.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
23. 23.💡 A battery lights 2 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
24. 24.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
25. 25.True or false: an LED lamp mainly gives out light. (a) False (b) True
26. 26.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) one bulb out, all go out (d) one out, the rest glow
27. 27.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
28. 28.🔍 Which is the odd one out? (a) a graphite rod (b) a steel coin (c) a wooden stick (d) an iron nail
29. 29.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) the bulb is unscrewed (d) the loop is complete
30. 30.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) junction (c) ammeter (d) switch
31. 31.Which of these mainly gives out heat? (a) a tube light (b) a rice cooker (c) a night lamp (d) an LED lamp
32. 32.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
33. 33.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) capacitor (b) LED (c) voltmeter (d) junction
34. 34.True or false: a circle with A inside is the symbol for a voltmeter. (a) False (b) True
35. 35.⚠️ 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
36. 36.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
38. 38.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) makes electricity (d) stores current
39. 39.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes

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