Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 613 · 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.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
2. 2.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
3. 3.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) battery (b) resistor (c) LED (d) voltmeter
4. 4.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) flips up or down (d) closes near a magnet
5. 5.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a push button (c) a toggle switch (d) a reed switch
6. 6.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) two or more cells joined (d) a switch with a lid
7. 7.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
8. 8.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
9. 9.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
11. 11.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
12. 12.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
13. 13.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
15. 15.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) switch (c) bulb (d) voltmeter
16. 16.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) dotted circles (d) little stars
17. 17.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
18. 18.🔋 6 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)? =
19. 19.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
20. 20.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) to make them heavy (d) plastic makes current
21. 21.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
22. 22.Which of these uses electricity? (a) a washing machine (b) a cell (c) a bicycle dynamo (d) a battery
23. 23.🔍 Which is the odd one out? (a) stop if a part gets hot (b) take cells out after use (c) build with an adult near (d) fly a kite near wires
24. 24.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a full circuit (d) a closed circuit
25. 25.True or false: a loudspeaker mainly gives out heat. (a) False (b) True
26. 26.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
27. 27.🔍 Which is the odd one out? (a) keep drinks far away (b) climb an electric pole (c) stay away from pylons (d) dry your hands first
28. 28.True or false: to dry your hands first is not safe. (a) True (b) False
29. 29.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a reed switch (d) a tilt switch
30. 30.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) throw cells in a fire (d) take cells out after use
31. 31.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
32. 32.True or false: to keep drinks far away is not safe. (a) True (b) False
33. 33.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
34. 34.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
35. 35.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
36. 36.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
37. 37.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
38. 38.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) cell (b) voltmeter (c) capacitor (d) battery
39. 39.Which of these is an insulator? (a) a glass marble (b) a steel spoon (c) a metal paper clip (d) a safety pin
40. 40.Which of these uses electricity? (a) a bicycle dynamo (b) a refrigerator (c) a cell (d) a battery

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