Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 721 · 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) open a phone charger (b) fly a kite near wires (c) build with an adult near (d) throw cells in a fire
2. 2.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) a break stops every bulb
3. 3.Which of these is an insulator? (a) a brass key (b) a dry cork (c) a graphite rod (d) a copper wire
4. 4.Which of these is safe? (a) take cells out after use (b) touch a fallen wire (c) throw cells in a fire (d) fly a kite near wires
5. 5.What does a reed switch do? (a) closes near a magnet (b) works only while pressed (c) springs back when let go (d) closes when tipped over
6. 6.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
7. 7.🔘 What does a switch do in a circuit? (a) stores current (b) opens or closes the loop (c) makes electricity (d) changes the voltage
8. 8.🔍 Which is the odd one out? (a) an iron nail (b) a steel coin (c) a graphite rod (d) a paper strip
9. 9.⚡ What does a rice cooker mainly change electricity into? (a) light (b) sound (c) movement (d) heat
10. 10.🔦 A circuit has a used-up (dead) 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) No (b) Yes
11. 11.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a glass marble. Does the bulb glow? (a) No (b) Yes
12. 12.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
13. 13.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
14. 14.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) never (d) when either is ON
15. 15.Which of these gives us electricity? (a) a refrigerator (b) a bicycle dynamo (c) a mobile phone (d) a computer
16. 16.True or false: a rubber eraser is a conductor. (a) True (b) False
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
18. 18.🔍 Which is the odd one out? (a) open a phone charger (b) throw cells in a fire (c) touch a switch when wet (d) stay away from pylons
19. 19.True or false: to stop if a part gets hot is safe. (a) True (b) False
20. 20.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
21. 21.True or false: to fly kites in open fields is safe. (a) False (b) True
22. 22.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a mains extension board (c) a wall socket (d) an inverter socket
23. 23.🔍 Which is the odd one out? (a) a brass key (b) aluminium foil (c) a dry cork (d) an iron nail
24. 24.Which of these is an insulator? (a) a graphite rod (b) a metal paper clip (c) a steel spoon (d) a glass marble
25. 25.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) own switch for each bulb (d) a break stops every bulb
26. 26.True or false: a mixer grinder mainly makes movement. (a) False (b) True
27. 27.Which of these is not safe? (a) take cells out after use (b) stay away from pylons (c) touch a fallen wire (d) stop if a part gets hot
28. 28.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
29. 29.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a single current path (d) one bulb out, all go out
30. 30.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a wire is cut (d) the loop is complete
31. 31.Which of these is a conductor? (a) a plastic ruler (b) a paper strip (c) a woollen thread (d) a safety pin
32. 32.🔦 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
33. 33.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
34. 34.Which of these is an insulator? (a) a safety pin (b) an iron nail (c) aluminium foil (d) a paper strip
35. 35.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
36. 36.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) each gets the full volts (d) used in house wiring
37. 37.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
38. 38.Which drawing is the symbol for a capacitor? (a) a circle with a cross (b) a circle with M inside (c) two equal parallel lines (d) one tall, one short bar
39. 39.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
40. 40.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity

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