Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 477 · 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 it safe to dry your hands first? (a) not safe (b) safe
2. 2.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) voltmeter (b) wire (c) cell (d) motor
3. 3.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔋 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
5. 5.Which of these is not safe? (a) stop if a part gets hot (b) poke things in a socket (c) keep drinks far away (d) take cells out after use
6. 6.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
7. 7.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
8. 8.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
9. 9.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) stop if a part gets hot (d) touch a fallen wire
10. 10.🔦 A circuit has a new 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 brass key. Does the bulb glow? (a) Yes (b) No
11. 11.True or false: a small empty box is the symbol for a motor. (a) True (b) False
12. 12.⚡ What does a room heater mainly change electricity into? (a) movement (b) sound (c) light (d) heat
13. 13.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
14. 14.True or false: an exhaust fan mainly gives out heat. (a) False (b) True
15. 15.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
17. 17.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) many paths for current (d) one out, the rest glow
18. 18.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a cell is taken out (c) the loop is complete (d) a wire is cut
19. 19.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
20. 20.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
21. 21.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a full circuit (d) a closed circuit
22. 22.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) a night lamp (b) a tube light (c) a loudspeaker (d) a torch
24. 24.Which of these is an insulator? (a) a graphite rod (b) aluminium foil (c) a safety pin (d) a woollen thread
25. 25.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) light (c) heat (d) movement
26. 26.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
27. 27.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.What does a tilt switch do? (a) closes when tipped over (b) flips up or down (c) closes near a magnet (d) springs back when let go
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
30. 30.Which of these is safe? (a) fly a kite near wires (b) throw cells in a fire (c) use mains for a project (d) stop if a part gets hot
31. 31.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
33. 33.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) bulbs share the voltage (d) each gets the full volts
34. 34.Which of these is safe? (a) fly a kite near wires (b) stay away from pylons (c) poke things in a socket (d) use mains for a project
35. 35.True or false: to use a cable with cuts is safe. (a) False (b) True
36. 36.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
37. 37.🔍 Which is the odd one out? (a) a school bell (b) a toaster (c) a loudspeaker (d) a doorbell
38. 38.Which of these mainly gives out heat? (a) an electric kettle (b) a tube light (c) a buzzer (d) a school bell
39. 39.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔍 Which is the odd one out? (a) a buzzer (b) a siren (c) a loudspeaker (d) a mixer grinder

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