Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 650 · 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.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
3. 3.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
4. 4.Which drawing is the symbol for a voltmeter? (a) a circle with M inside (b) a long and a short line (c) a line lifted at a gap (d) a circle with V inside
5. 5.Which of these is not safe? (a) take cells out after use (b) use small battery cells (c) build with an adult near (d) use mains for a project
6. 6.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) resistor (b) battery (c) LED (d) ammeter
7. 7.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
8. 8.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
9. 9.Which of these gives us electricity? (a) a television (b) a water pump (c) a washing machine (d) a solar panel
10. 10.Which drawing is the symbol for a switch? (a) one tall, one short bar (b) two or more cell symbols (c) a line lifted at a gap (d) many long-short pairs
11. 11.What does a reed switch do? (a) flips up or down (b) stays where you flip it (c) closes near a magnet (d) slides side to side
12. 12.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) cell (b) switch (c) wire (d) bulb
13. 13.🔦 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 a steel spoon. Does the bulb glow? (a) Yes (b) No
14. 14.🔍 Which is the odd one out? (a) fly a kite near wires (b) touch a fallen wire (c) open a phone charger (d) fly kites in open fields
15. 15.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) slides side to side (d) stays where you flip it
16. 16.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
17. 17.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
18. 18.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) all wires are joined (d) the switch is OFF
19. 19.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
21. 21.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
22. 22.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a conductor (d) a cell
23. 23.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
24. 24.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
25. 25.Which of these is safe? (a) poke things in a socket (b) touch a fallen wire (c) keep drinks far away (d) climb an electric pole
26. 26.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
28. 28.True or false: a paper strip is a conductor. (a) True (b) False
29. 29.Which drawing is the symbol for a bulb? (a) a circle with a cross (b) triangle against a bar (c) two equal parallel lines (d) a circle with V inside
30. 30.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
31. 31.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
32. 32.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.Which drawing is the symbol for a battery? (a) a line lifted at a gap (b) a circle with M inside (c) two or more cell symbols (d) a straight line
34. 34.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
35. 35.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
36. 36.True or false: a glass marble is a conductor. (a) False (b) True
37. 37.⚡ What does a tube light mainly change electricity into? (a) light (b) movement (c) sound (d) heat
38. 38.🔍 Which is the odd one out? (a) keep drinks far away (b) use small battery cells (c) fly kites in open fields (d) climb an electric pole
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
40. 40.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =

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