Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 823 · 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.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the switch (d) the glass
2. 2.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) own switch for each bulb (d) many paths for current
3. 3.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
4. 4.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
5. 5.True or false: an exhaust fan mainly gives out heat. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) a rubber band (d) aluminium foil
7. 7.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) no voltage (d) the same voltage
8. 8.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.🔍 Which is the odd one out? (a) use mains for a project (b) keep drinks far away (c) use a cable with cuts (d) throw cells in a fire
10. 10.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
11. 11.⚡ What does a street light mainly change electricity into? (a) sound (b) movement (c) light (d) heat
12. 12.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these gives us electricity? (a) a computer (b) a washing machine (c) a solar panel (d) a television
14. 14.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
16. 16.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
18. 18.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) give them for recycling (d) cut them open
19. 19.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
20. 20.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
21. 21.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
22. 22.🔋 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)? =
23. 23.Which of these means the circuit is open? (a) the switch is ON (b) a wire has come loose (c) the loop is complete (d) all wires are joined
24. 24.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
25. 25.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
26. 26.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) broken (d) open
27. 27.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) wait and watch (c) shout for an adult (d) pour water on them
28. 28.True or false: to use a cable with cuts is safe. (a) True (b) False
29. 29.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
30. 30.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
31. 31.⚡ What does a school bell mainly change electricity into? (a) sound (b) heat (c) movement (d) light
32. 32.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
33. 33.Which of these is a conductor? (a) a rubber band (b) a plastic ruler (c) a paper strip (d) a safety pin
34. 34.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
35. 35.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
36. 36.🔌 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
37. 37.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.True or false: a circle with an X in it is the symbol for a battery. (a) False (b) True
39. 39.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
40. 40.Which of these is safe? (a) throw cells in a fire (b) use small battery cells (c) open a phone charger (d) poke things in a socket

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