Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 629 · 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 kind of switch springs back when let go? (a) a slide switch (b) a push button (c) a reed switch (d) a toggle switch
2. 2.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
3. 3.Which drawing is the symbol for a battery? (a) one tall, one short bar (b) many long-short pairs (c) a circle with an X in it (d) a straight line
4. 4.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
5. 5.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
7. 7.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to hide the circuit (c) to make it colourful (d) symbols are heavier
8. 8.🔍 Which is the odd one out? (a) a steel coin (b) a wooden stick (c) a cotton thread (d) a glass marble
9. 9.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
10. 10.🔍 Which is the odd one out? (a) use small battery cells (b) dry your hands first (c) build with an adult near (d) use a cable with cuts
11. 11.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
12. 12.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) the loop is complete (d) a cell is taken out
13. 13.🔍 Which is the odd one out? (a) use small battery cells (b) touch a switch when wet (c) take cells out after use (d) stay away from pylons
14. 14.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) friction (d) a magnet
15. 15.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) open a phone charger (d) take cells out after use
17. 17.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
18. 18.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) heat (c) sound (d) movement
19. 19.🔍 Which is the odd one out? (a) take cells out after use (b) use small battery cells (c) stay away from pylons (d) throw cells in a fire
20. 20.What does a reed switch do? (a) closes near a magnet (b) works only while pressed (c) springs back when let go (d) stays where you flip it
21. 21.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) when both are ON (d) never
22. 22.Which of these is true of a series circuit? (a) a single current path (b) used in house wiring (c) many paths for current (d) own switch for each bulb
23. 23.What does a slide switch do? (a) flips up or down (b) closes when tipped over (c) stays where you flip it (d) slides side to side
24. 24.Which of these is not safe? (a) touch a switch when wet (b) build with an adult near (c) dry your hands first (d) stop if a part gets hot
25. 25.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
27. 27.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) each gets the full volts (d) many paths for current
28. 28.🔋 How many 2 V cells must be joined in series to give 14 V?
29. 29.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 230 V (d) 12 V
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
31. 31.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
32. 32.True or false: a reed switch flips up or down. (a) False (b) True
33. 33.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
34. 34.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
35. 35.Which of these is a conductor? (a) a paper strip (b) a dry cork (c) a ceramic cup (d) a safety pin
36. 36.Which of these is a conductor? (a) a steel spoon (b) a cotton thread (c) a wooden stick (d) a plastic straw
37. 37.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
38. 38.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) double the voltage (d) no voltage
39. 39.🔋 How many 1.5 V cells must be joined in series to give 3 V?
40. 40.✏️ In a circuit diagram, which part is drawn as a straight line? (a) diode (b) resistor (c) wire (d) LED

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