Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 593 · 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.Which of these means the circuit is open? (a) the loop is complete (b) a wire is cut (c) all wires are joined (d) the switch is ON
2. 2.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
3. 3.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) plastic is a conductor (d) to make them heavy
4. 4.🔦 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) Yes (b) No
5. 5.True or false: a rubber band is a conductor. (a) False (b) True
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) none (d) only one
7. 7.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
8. 8.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
9. 9.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) quick and clear for all (d) symbols are heavier
10. 10.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
11. 11.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) it is just untidy (d) water carries current
12. 12.💡 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. Bulb 3 is taken out of its holder. Does bulb 6 glow? (a) Yes (b) No
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
14. 14.True or false: a tilt switch flips up or down. (a) False (b) True
15. 15.True or false: a dry cork is a conductor. (a) False (b) True
16. 16.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
17. 17.True or false: to use a cable with cuts is safe. (a) True (b) False
18. 18.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
19. 19.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the longer line (d) the shorter line
20. 20.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
21. 21.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
22. 22.Which drawing is the symbol for an ammeter? (a) two equal parallel lines (b) a circle with a cross (c) two or more cell symbols (d) a circle with A inside
23. 23.💡 A battery lights 5 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
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.🔍 Which is the odd one out? (a) an electric drill (b) an electric toy car (c) a table fan (d) a traffic signal
26. 26.🔍 Which is the odd one out? (a) touch a switch when wet (b) climb an electric pole (c) keep drinks far away (d) open a phone charger
27. 27.⚡ What does an electric toy car mainly change electricity into? (a) movement (b) light (c) heat (d) sound
28. 28.⚡ What does a traffic signal mainly change electricity into? (a) light (b) heat (c) sound (d) movement
29. 29.🔋 How many 1.2 V cells must be joined in series to give 6 V?
30. 30.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
31. 31.True or false: a glass marble is a conductor. (a) True (b) False
32. 32.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) a long and a short line (c) a dot where wires meet (d) two or more cell symbols
33. 33.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) diode (c) motor (d) bulb
34. 34.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
35. 35.Which of these is not safe? (a) stay away from pylons (b) keep drinks far away (c) build with an adult near (d) touch a fallen wire
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
38. 38.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
39. 39.🔍 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) touch a fallen wire
40. 40.🔦 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) Yes (b) No

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