Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 292 · 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.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
2. 2.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire is cut
3. 3.🔋 How many 3 V cells must be joined in series to give 15 V?
4. 4.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
5. 5.Which of these uses electricity? (a) a battery (b) a power station (c) a television (d) a cell
6. 6.Which of these is safe? (a) poke things in a socket (b) open a phone charger (c) stay away from pylons (d) use a cable with cuts
7. 7.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a dot where wires meet (c) a long and a short line (d) a circle with A inside
9. 9.Which of these is not safe? (a) stay away from pylons (b) fly a kite near wires (c) build with an adult near (d) dry your hands first
10. 10.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
11. 11.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
13. 13.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
14. 14.True or false: a circle with M inside is the symbol for a resistor. (a) False (b) True
15. 15.Which of these is not safe? (a) keep drinks far away (b) stop if a part gets hot (c) stay away from pylons (d) poke things in a socket
16. 16.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
17. 17.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the bulb is unscrewed
18. 18.Which of these is not safe? (a) build with an adult near (b) stay away from pylons (c) keep drinks far away (d) touch a fallen wire
19. 19.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
20. 20.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
21. 21.🔍 Which is the odd one out? (a) a torch (b) an LED lamp (c) a street light (d) a room heater
22. 22.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.💡 2 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. How many bulbs glow?
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 rubber eraser. Does the bulb glow? (a) Yes (b) No
25. 25.🔍 Which is the odd one out? (a) build with an adult near (b) take cells out after use (c) throw cells in a fire (d) fly kites in open fields
26. 26.🔦 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
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
28. 28.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) each gets the full volts
29. 29.Which of these mainly gives out heat? (a) a loudspeaker (b) a table fan (c) an electric kettle (d) a ceiling fan
30. 30.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) electrical energy (d) nuclear energy
31. 31.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
33. 33.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
34. 34.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
35. 35.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
36. 36.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a parallel circuit (c) a safe circuit (d) an open circuit
37. 37.🔦 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) Yes (b) No
38. 38.Which of these gives us electricity? (a) a washing machine (b) a wind turbine (c) a water pump (d) a refrigerator
39. 39.🔍 Which is the odd one out? (a) poke things in a socket (b) keep drinks far away (c) touch a fallen wire (d) fly a kite near wires
40. 40.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) photons (c) electrons (d) dust particles

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