Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 490 · 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: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
2. 2.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
3. 3.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
4. 4.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
5. 5.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
6. 6.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
7. 7.True or false: to build with an adult near is not safe. (a) False (b) True
8. 8.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
9. 9.🔍 Which is the odd one out? (a) use small battery cells (b) dry your hands first (c) stop if a part gets hot (d) use mains for a project
10. 10.⚡ What does a night lamp mainly change electricity into? (a) heat (b) movement (c) sound (d) light
11. 11.🔍 Which is the odd one out? (a) take cells out after use (b) throw cells in a fire (c) use small battery cells (d) build with an adult near
12. 12.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
13. 13.Which of these is safe? (a) poke things in a socket (b) use mains for a project (c) stay away from pylons (d) use a cable with cuts
14. 14.Which drawing is the symbol for a switch? (a) a circle with A inside (b) one tall, one short bar (c) a small empty box (d) a line lifted at a gap
15. 15.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
16. 16.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
17. 17.Which of these mainly makes sound? (a) a night lamp (b) an electric kettle (c) a water heater (d) a siren
18. 18.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
19. 19.True or false: a line lifted at a gap is the symbol for a battery. (a) True (b) False
20. 20.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a glass marble (d) a safety pin
21. 21.What does a push button do? (a) flips up or down (b) stays where you flip it (c) springs back when let go (d) slides side to side
22. 22.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) not joined (d) in parallel
23. 23.🔍 Which is the odd one out? (a) poke things in a socket (b) use mains for a project (c) touch a switch when wet (d) build with an adult near
24. 24.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a toggle switch (c) a push button (d) a slide switch
25. 25.True or false: a circle with V inside is the symbol for a motor. (a) True (b) False
26. 26.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which of these mainly makes movement? (a) a room heater (b) a table fan (c) an electric iron (d) a torch
28. 28.🔍 Which is the odd one out? (a) an electric kettle (b) a rice cooker (c) a loudspeaker (d) a water heater
29. 29.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) No (b) Yes
30. 30.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
31. 31.Which of these is an insulator? (a) a wooden stick (b) a safety pin (c) a brass key (d) an iron nail
32. 32.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
33. 33.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.True or false: to fly a kite near wires is safe. (a) True (b) False
36. 36.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a toggle switch
37. 37.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
38. 38.⚡ What does a doorbell mainly change electricity into? (a) movement (b) sound (c) light (d) heat
39. 39.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
40. 40.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True

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