Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 70 · 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.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
2. 2.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
3. 3.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a slide switch (c) a toggle switch (d) a tilt switch
4. 4.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
5. 5.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.🔍 Which is the odd one out? (a) a glass marble (b) a dry cork (c) a ceramic cup (d) a graphite rod
7. 7.🔍 Which is the odd one out? (a) use mains for a project (b) keep drinks far away (c) touch a switch when wet (d) fly a kite near wires
8. 8.True or false: a reed switch closes near a magnet. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a glass marble (b) a rubber band (c) a rubber eraser (d) a safety pin
10. 10.🔍 Which is the odd one out? (a) a woollen thread (b) a plastic ruler (c) a metal paper clip (d) a glass marble
11. 11.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
12. 12.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a wire has come loose
13. 13.Which of these is an insulator? (a) aluminium foil (b) a dry cork (c) a steel spoon (d) a steel coin
14. 14.⚡ What does an electric drill mainly change electricity into? (a) movement (b) sound (c) light (d) heat
15. 15.🔍 Which is the odd one out? (a) open a phone charger (b) fly kites in open fields (c) take cells out after use (d) keep drinks far away
16. 16.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
18. 18.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.True or false: a circle with V inside is the symbol for a switch. (a) False (b) True
20. 20.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
21. 21.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
22. 22.🔦 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 copper wire. Does the bulb glow? (a) Yes (b) No
23. 23.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) many paths for current (d) a break stops every bulb
24. 24.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) cut them open (d) give them for recycling
25. 25.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
26. 26.🔍 Which is the odd one out? (a) keep drinks far away (b) take cells out after use (c) fly kites in open fields (d) poke things in a socket
27. 27.Which drawing is the symbol for a battery? (a) a line lifted at a gap (b) a circle with M inside (c) a dot where wires meet (d) many long-short pairs
28. 28.Which of these mainly makes sound? (a) a traffic signal (b) an electric drill (c) a table fan (d) a school bell
29. 29.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
30. 30.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
32. 32.True or false: to fly kites in open fields is not safe. (a) True (b) False
33. 33.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) touch a switch when wet (d) fly kites in open fields
34. 34.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) electric current (d) sound
35. 35.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
36. 36.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
37. 37.Which of these gives us electricity? (a) an air conditioner (b) a mobile phone (c) a computer (d) a cell
38. 38.Which drawing is the symbol for a bulb? (a) a line lifted at a gap (b) many long-short pairs (c) triangle, bar and arrows (d) a circle with a cross
39. 39.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
40. 40.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =

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