Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 522 · 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 is true of a parallel circuit? (a) a single current path (b) each gets the full volts (c) one bulb out, all go out (d) bulbs share the voltage
2. 2.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
3. 3.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) a younger child (d) nobody
4. 4.True or false: an electric iron mainly makes sound. (a) True (b) False
5. 5.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one out, the rest glow (d) one bulb out, all go out
6. 6.Which of these is a conductor? (a) a glass marble (b) a dry cork (c) a plastic straw (d) a steel coin
7. 7.🔦 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 woollen thread. Does the bulb glow? (a) Yes (b) No
8. 8.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
9. 9.Which of these is not safe? (a) build with an adult near (b) fly a kite near wires (c) stay away from pylons (d) keep drinks far away
10. 10.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
11. 11.Which of these mainly gives out heat? (a) a school bell (b) a mixer grinder (c) a traffic signal (d) a toaster
12. 12.🔍 Which is the odd one out? (a) a school bell (b) an electric kettle (c) an electric iron (d) a water heater
13. 13.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.Which of these gives us electricity? (a) a television (b) a mobile phone (c) a refrigerator (d) a wind turbine
15. 15.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
16. 16.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
17. 17.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) battery (c) resistor (d) capacitor
18. 18.🔘 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?
19. 19.Which of these is safe? (a) use a cable with cuts (b) take cells out after use (c) poke things in a socket (d) touch a switch when wet
20. 20.True or false: “a single current path” is true of a series circuit. (a) False (b) True
21. 21.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) Yes (b) No
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
24. 24.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
25. 25.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
26. 26.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
27. 27.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
28. 28.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly a kite near wires (c) touch a switch when wet (d) climb an electric pole
29. 29.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
30. 30.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
31. 31.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
32. 32.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
34. 34.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
35. 35.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are ON (c) when either is ON (d) only when both are OFF
36. 36.True or false: a graphite rod is a conductor. (a) False (b) True
37. 37.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
38. 38.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
39. 39.True or false: a toaster mainly makes sound. (a) False (b) True
40. 40.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) movement (c) sound (d) heat

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