Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 585 · 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 cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the shorter line (d) the longer line
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire is cut (c) a wire has come loose (d) the loop is complete
4. 4.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
5. 5.🔍 Which is the odd one out? (a) a school bell (b) a doorbell (c) a room heater (d) a siren
6. 6.🔍 Which is the odd one out? (a) an electric iron (b) a night lamp (c) a traffic signal (d) a torch
7. 7.💡 6 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 5 are taken out of their holders. How many bulbs glow?
8. 8.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) only when both are ON (d) when either is ON
9. 9.🔍 Which is the odd one out? (a) stop if a part gets hot (b) dry your hands first (c) poke things in a socket (d) stay away from pylons
10. 10.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
11. 11.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
12. 12.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) double the voltage (d) no voltage
13. 13.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
14. 14.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
15. 15.⚡ What does an electric iron mainly change electricity into? (a) movement (b) sound (c) light (d) heat
16. 16.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
17. 17.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
18. 18.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
19. 19.True or false: a room heater mainly gives out heat. (a) True (b) False
20. 20.What does a reed switch do? (a) stays where you flip it (b) flips up or down (c) works only while pressed (d) closes near a magnet
21. 21.True or false: a circle with V inside is the symbol for a battery. (a) False (b) True
22. 22.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a cell (d) a switch that is ON
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) Yes (b) No
24. 24.🔦 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) No (b) Yes
25. 25.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
26. 26.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a push button
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a wire is cut (d) all wires are joined
29. 29.🔍 Which is the odd one out? (a) touch a switch when wet (b) fly kites in open fields (c) keep drinks far away (d) use small battery cells
30. 30.⚡ What does a tube light mainly change electricity into? (a) sound (b) movement (c) heat (d) light
31. 31.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) a single current path (d) own switch for each bulb
32. 32.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
33. 33.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
34. 34.True or false: a toggle switch closes near a magnet. (a) True (b) False
35. 35.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
36. 36.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
37. 37.🔦 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) No (b) Yes
38. 38.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
39. 39.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 5 glow? (a) Yes (b) No
40. 40.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity

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