Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 326 · 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: to stay away from pylons is safe. (a) True (b) False
2. 2.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
3. 3.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
4. 4.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) light energy (c) sound energy (d) movement energy
5. 5.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) a single current path (d) each gets the full volts
6. 6.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
7. 7.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
8. 8.Which of these mainly gives out light? (a) a siren (b) a mixer grinder (c) a doorbell (d) a night lamp
9. 9.Which of these mainly makes sound? (a) a tube light (b) a water heater (c) an electric kettle (d) a buzzer
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
11. 11.True or false: to climb an electric pole is not safe. (a) False (b) True
12. 12.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
13. 13.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) ammeter (b) junction (c) switch (d) diode
14. 14.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
15. 15.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
19. 19.Which drawing is the symbol for an LED? (a) a circle with M inside (b) triangle, bar and arrows (c) a dot where wires meet (d) a long and a short line
20. 20.Which drawing is the symbol for a battery? (a) triangle, bar and arrows (b) triangle against a bar (c) two or more cell symbols (d) a circle with an X in it
21. 21.Which of these gives us electricity? (a) a water pump (b) a battery (c) a computer (d) a mobile phone
22. 22.🔍 Which is the odd one out? (a) a street light (b) an electric toy car (c) a traffic signal (d) a night lamp
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
24. 24.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) bulbs share the voltage
25. 25.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the glass (d) the filament
26. 26.🔍 Which is the odd one out? (a) a graphite rod (b) a steel spoon (c) a cotton thread (d) a copper wire
27. 27.True or false: two equal parallel lines is the symbol for a diode. (a) True (b) False
28. 28.Which of these is true of a series circuit? (a) used in house wiring (b) a break stops every bulb (c) own switch for each bulb (d) one out, the rest glow
29. 29.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
30. 30.True or false: a toggle switch flips up or down. (a) False (b) True
31. 31.Which of these uses electricity? (a) a generator (b) a battery (c) a power station (d) an air conditioner
32. 32.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
33. 33.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) an open circuit (d) a closed circuit
34. 34.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) capacitor (b) motor (c) junction (d) diode
36. 36.Which drawing is the symbol for a bulb? (a) a straight line (b) a plain rectangle (c) a circle with a cross (d) a circle with M inside
37. 37.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a broken path (d) a plastic gap
38. 38.🔍 Which is the odd one out? (a) a traffic signal (b) a mixer grinder (c) an electric drill (d) a table fan
39. 39.⚡ What does a room heater mainly change electricity into? (a) heat (b) light (c) movement (d) sound
40. 40.Which of these mainly gives out heat? (a) a siren (b) a ceiling fan (c) an electric iron (d) an electric drill

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