Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 633 · 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 part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the bare end (d) the steel shaft
2. 2.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
3. 3.Which of these means the circuit is closed? (a) the switch is OFF (b) a cell is taken out (c) the bulb is unscrewed (d) the loop is complete
4. 4.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
5. 5.🔦 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
6. 6.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a short circuit (d) a safe circuit
7. 7.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
8. 8.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) no voltage (d) the same voltage
9. 9.Which of these uses electricity? (a) a television (b) a generator (c) a battery (d) a wind turbine
10. 10.True or false: to take cells out after use is not safe. (a) False (b) True
11. 11.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
12. 12.True or false: a reed switch closes near a magnet. (a) True (b) False
13. 13.⚡ What does a buzzer mainly change electricity into? (a) movement (b) sound (c) heat (d) light
14. 14.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the filament (d) the glass
15. 15.Which of these is safe? (a) throw cells in a fire (b) touch a fallen wire (c) stop if a part gets hot (d) fly a kite near wires
16. 16.🔍 Which is the odd one out? (a) throw cells in a fire (b) climb an electric pole (c) use mains for a project (d) stay away from pylons
17. 17.Which drawing is the symbol for a battery? (a) a circle with M inside (b) a circle with A inside (c) a line lifted at a gap (d) two or more cell symbols
18. 18.Which of these is an insulator? (a) a cotton thread (b) a graphite rod (c) a copper wire (d) a steel spoon
19. 19.🔍 Which is the odd one out? (a) a cotton thread (b) a brass key (c) a plastic ruler (d) a rubber band
20. 20.🔦 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
21. 21.🔋 4 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)? =
22. 22.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
23. 23.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a steel coin (d) a wooden stick
24. 24.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
25. 25.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
26. 26.🔦 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) No (b) Yes
27. 27.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
29. 29.True or false: to stop if a part gets hot is safe. (a) False (b) True
30. 30.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.Which of these is an insulator? (a) a steel spoon (b) a glass marble (c) a metal paper clip (d) a steel coin
32. 32.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
33. 33.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.⚡ What does a room heater mainly change electricity into? (a) movement (b) sound (c) light (d) heat
36. 36.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 12 V (d) 1.5 V
37. 37.🔍 Which is the odd one out? (a) a plastic straw (b) a steel spoon (c) a plastic ruler (d) a cotton thread
38. 38.True or false: a graphite rod is an insulator. (a) True (b) False
39. 39.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
40. 40.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity

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