Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 275 · 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.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
2. 2.Which of these is safe? (a) touch a switch when wet (b) use a cable with cuts (c) use mains for a project (d) stop if a part gets hot
3. 3.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
4. 4.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) only one (d) none
7. 7.Which of these is a conductor? (a) a rubber eraser (b) a dry cork (c) a brass key (d) a rubber band
8. 8.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
9. 9.🔦 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 woollen thread. Does the bulb glow? (a) Yes (b) No
10. 10.Which of these mainly gives out heat? (a) a tube light (b) a room heater (c) a school bell (d) a loudspeaker
11. 11.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.True or false: a doorbell mainly gives out light. (a) False (b) True
13. 13.Which of these mainly makes movement? (a) a toaster (b) an electric kettle (c) a buzzer (d) a table fan
14. 14.Which of these gives us electricity? (a) a generator (b) a water pump (c) a refrigerator (d) a television
15. 15.Which of these means the circuit is open? (a) the bulb is unscrewed (b) the loop is complete (c) the switch is ON (d) all wires are joined
16. 16.True or false: a tilt switch slides side to side. (a) False (b) True
17. 17.Which of these uses electricity? (a) a power station (b) a cell (c) a bicycle dynamo (d) a washing machine
18. 18.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
19. 19.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.True or false: “a single current path” is true of a series circuit. (a) False (b) True
23. 23.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) sound (d) light
24. 24.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) wait and watch (d) shout for an adult
25. 25.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
28. 28.Which of these is safe? (a) use a cable with cuts (b) stay away from pylons (c) throw cells in a fire (d) touch a switch when wet
29. 29.🔋 4 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)? =
30. 30.🔍 Which is the odd one out? (a) a mixer grinder (b) an electric kettle (c) a ceiling fan (d) an electric toy car
31. 31.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) a conductor (d) an insulator
32. 32.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a short circuit (c) an open circuit (d) a parallel circuit
33. 33.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
34. 34.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
35. 35.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
36. 36.True or false: aluminium foil is an insulator. (a) False (b) True
37. 37.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
38. 38.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) makes electricity (d) opens or closes the loop
39. 39.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a mains extension board (c) a wall socket (d) an inverter socket
40. 40.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) many paths for current (c) a single current path (d) a break stops every bulb

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