Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 248 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
2. 2.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) water makes it cold (d) it is just untidy
3. 3.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
4. 4.⚡ What does a school bell mainly change electricity into? (a) movement (b) heat (c) light (d) sound
5. 5.True or false: a circle with an X in it is the symbol for a voltmeter. (a) False (b) True
6. 6.⚡ What does a rice cooker mainly change electricity into? (a) heat (b) light (c) movement (d) sound
7. 7.What does a tilt switch do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) flips up or down
8. 8.Which of these gives us electricity? (a) a computer (b) a solar panel (c) a refrigerator (d) a washing machine
9. 9.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
10. 10.🔋 6 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)? =
11. 11.Which of these uses electricity? (a) a generator (b) a solar panel (c) a cell (d) a refrigerator
12. 12.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) electrical energy (d) sound energy
13. 13.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
14. 14.💡 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
15. 15.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
16. 16.True or false: to use mains for a project is not safe. (a) False (b) True
17. 17.Which of these mainly gives out heat? (a) an LED lamp (b) a water heater (c) a siren (d) a tube light
18. 18.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
19. 19.⚡ What does a siren mainly change electricity into? (a) sound (b) movement (c) light (d) heat
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
21. 21.🔍 Which is the odd one out? (a) use mains for a project (b) poke things in a socket (c) use small battery cells (d) fly a kite near wires
22. 22.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
23. 23.Which of these is a conductor? (a) a wooden stick (b) a rubber band (c) a glass marble (d) a copper wire
24. 24.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) motor (b) bulb (c) resistor (d) voltmeter
25. 25.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
26. 26.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
27. 27.What does a toggle switch do? (a) works only while pressed (b) closes near a magnet (c) stays where you flip it (d) springs back when let go
28. 28.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
29. 29.Which drawing is the symbol for an LED? (a) two equal parallel lines (b) a dot where wires meet (c) triangle, bar and arrows (d) a circle with A inside
30. 30.🔘 A bulb and a cell are joined through 4 switches on 4 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?
31. 31.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
32. 32.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) a bigger voltage (d) no voltage
33. 33.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
34. 34.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
35. 35.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) one loose end (d) a plastic gap
36. 36.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
38. 38.Which drawing is the symbol for a capacitor? (a) a line lifted at a gap (b) two equal parallel lines (c) a circle with A inside (d) many long-short pairs
39. 39.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes

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