Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 350 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
3. 3.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
4. 4.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell
5. 5.True or false: a plastic ruler is a conductor. (a) False (b) True
6. 6.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
7. 7.Which of these is an insulator? (a) a plastic ruler (b) a steel coin (c) a copper wire (d) a steel spoon
8. 8.🔦 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 woollen thread. Does the bulb glow? (a) Yes (b) No
9. 9.🔋 5 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)? =
10. 10.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
11. 11.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a circle with A inside (c) one tall, one short bar (d) two or more cell symbols
12. 12.True or false: triangle against a bar is the symbol for a voltmeter. (a) True (b) False
13. 13.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
14. 14.Which of these is safe? (a) stop if a part gets hot (b) throw cells in a fire (c) use mains for a project (d) fly a kite near wires
15. 15.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
18. 18.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔦 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 plastic ruler. Does the bulb glow? (a) Yes (b) No
20. 20.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
21. 21.Which of these mainly makes movement? (a) a table fan (b) a toaster (c) a buzzer (d) an LED lamp
22. 22.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) No (b) Yes
23. 23.Which drawing is the symbol for a resistor? (a) two or more cell symbols (b) a small empty box (c) a long and a short line (d) one tall, one short bar
24. 24.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
25. 25.Which of these means the circuit is closed? (a) a wire has come loose (b) the loop is complete (c) a wire is cut (d) the switch is OFF
26. 26.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
28. 28.🔋 3 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)? =
29. 29.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) quick and clear for all (d) symbols are heavier
30. 30.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) voltmeter (b) motor (c) bulb (d) battery
31. 31.🔦 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 safety pin. Does the bulb glow? (a) No (b) Yes
32. 32.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a night lamp (b) a room heater (c) an electric kettle (d) an electric iron
34. 34.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
35. 35.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
36. 36.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) wind energy (d) light energy
37. 37.Which of these means the circuit is closed? (a) a wire has come loose (b) a wire is cut (c) the switch is ON (d) the switch is OFF
38. 38.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
39. 39.What does a reed switch do? (a) closes near a magnet (b) closes when tipped over (c) works only while pressed (d) springs back when let go
40. 40.True or false: a long and a short line is the symbol for a wire. (a) False (b) True

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids