Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 892 · 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.True or false: a tilt switch closes near a magnet. (a) True (b) False
2. 2.Which of these is an insulator? (a) a steel spoon (b) a steel coin (c) an iron nail (d) a plastic ruler
3. 3.💡 6 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
4. 4.🔌 Most metals are good … (a) conductors (b) insulators (c) magnets only (d) batteries
5. 5.True or false: a woollen thread is a conductor. (a) True (b) False
6. 6.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
7. 7.True or false: one tall, one short bar is the symbol for a cell. (a) True (b) False
8. 8.Which of these uses electricity? (a) a computer (b) a bicycle dynamo (c) a cell (d) a wind turbine
9. 9.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
10. 10.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
11. 11.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) sound energy (d) nuclear energy
12. 12.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
13. 13.🔁 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
14. 14.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
15. 15.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
16. 16.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) a wire has come loose (d) the switch is OFF
17. 17.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
18. 18.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) two (d) none
19. 19.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) junction (b) voltmeter (c) diode (d) resistor
21. 21.Which of these is not safe? (a) open a phone charger (b) use small battery cells (c) fly kites in open fields (d) take cells out after use
22. 22.💡 A battery lights 5 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
23. 23.🔍 Which is the odd one out? (a) climb an electric pole (b) use a cable with cuts (c) stop if a part gets hot (d) poke things in a socket
24. 24.True or false: to keep drinks far away is not safe. (a) False (b) True
25. 25.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
26. 26.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
27. 27.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
28. 28.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔍 Which is the odd one out? (a) an LED lamp (b) a tube light (c) a torch (d) an electric iron
30. 30.🔦 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) No (b) Yes
31. 31.⚡ What does a table fan mainly change electricity into? (a) heat (b) movement (c) light (d) sound
32. 32.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
33. 33.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
34. 34.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) give them for recycling (d) throw them in a fire
35. 35.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
36. 36.True or false: a mixer grinder mainly gives out heat. (a) False (b) True
37. 37.Which of these means the circuit is closed? (a) the switch is ON (b) a cell is taken out (c) the switch is OFF (d) a wire has come loose
38. 38.🔘 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?
39. 39.What does a push button do? (a) works only while pressed (b) closes near a magnet (c) stays where you flip it (d) flips up or down
40. 40.🔍 Which is the odd one out? (a) an electric iron (b) an LED lamp (c) a water heater (d) an electric kettle

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