Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 38 · 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 safe? (a) climb an electric pole (b) stay away from pylons (c) fly a kite near wires (d) use mains for a project
2. 2.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a safe circuit (d) a short circuit
3. 3.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) only one (d) it does not matter
4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
6. 6.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
7. 7.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
8. 8.🔘 What does a switch do in a circuit? (a) stores current (b) opens or closes the loop (c) makes electricity (d) changes the voltage
9. 9.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 0.5 V (c) 230 V (d) 15 V
10. 10.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
11. 11.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
12. 12.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
13. 13.🔍 Which is the odd one out? (a) a glass marble (b) a rubber eraser (c) an iron nail (d) a dry cork
14. 14.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
15. 15.Which of these gives us electricity? (a) a wind turbine (b) a water pump (c) a computer (d) a washing machine
16. 16.Which of these mainly gives out heat? (a) a room heater (b) a tube light (c) an electric drill (d) an exhaust fan
17. 17.Which of these is safe? (a) touch a fallen wire (b) open a phone charger (c) fly kites in open fields (d) climb an electric pole
18. 18.🔌 Most metals are good … (a) batteries (b) magnets only (c) insulators (d) conductors
19. 19.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
20. 20.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the longer line (d) the shorter line
21. 21.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) used in house wiring (d) bulbs share the voltage
23. 23.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) movement energy (d) chemical energy
24. 24.🔋 How many 1.2 V cells must be joined in series to give 6 V?
25. 25.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
26. 26.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
27. 27.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) each gets the full volts (d) a single current path
28. 28.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
29. 29.True or false: to keep drinks far away is not safe. (a) False (b) True
30. 30.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
31. 31.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
32. 32.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
33. 33.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
34. 34.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
35. 35.True or false: a dot where wires meet is the symbol for a junction. (a) False (b) True
36. 36.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) sound (c) light (d) heat
37. 37.Which of these gives us electricity? (a) a computer (b) a television (c) a battery (d) a washing machine
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
39. 39.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one for each bulb (d) one
40. 40.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) sound energy (c) electrical energy (d) wind energy

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