Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 295 · 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.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
2. 2.🔦 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) No (b) Yes
3. 3.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
4. 4.What does a push button do? (a) closes when tipped over (b) springs back when let go (c) flips up or down (d) slides side to side
5. 5.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
6. 6.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
7. 7.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) sound (c) heat (d) movement
8. 8.🔍 Which is the odd one out? (a) an electric kettle (b) a siren (c) a loudspeaker (d) a doorbell
9. 9.Which of these gives us electricity? (a) a washing machine (b) a power station (c) a computer (d) a television
10. 10.🔋 5 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)? =
11. 11.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are ON (d) when both are OFF
12. 12.What does a slide switch do? (a) springs back when let go (b) closes when tipped over (c) flips up or down (d) slides side to side
13. 13.True or false: to dry your hands first is safe. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) touch a fallen wire (b) touch a switch when wet (c) throw cells in a fire (d) use small battery cells
15. 15.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a break stops every bulb (c) one bulb out, all go out (d) bulbs share the voltage
17. 17.True or false: a slide switch slides side to side. (a) True (b) False
18. 18.Which of these is an insulator? (a) a rubber eraser (b) a copper wire (c) a metal paper clip (d) an iron nail
19. 19.💡 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
20. 20.Which of these is an insulator? (a) a copper wire (b) aluminium foil (c) a ceramic cup (d) a graphite rod
21. 21.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
22. 22.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
23. 23.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
24. 24.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a trusted adult (c) a younger child (d) nobody
25. 25.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) motor (b) wire (c) resistor (d) switch
26. 26.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) a woollen thread (d) a copper wire
27. 27.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
28. 28.Which of these uses electricity? (a) a power station (b) a battery (c) a television (d) a bicycle dynamo
29. 29.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) an open circuit (d) a short circuit
30. 30.🔍 Which is the odd one out? (a) a plastic straw (b) a rubber eraser (c) a paper strip (d) a safety pin
31. 31.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) a magnet (c) sound (d) electric current
32. 32.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) 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.True or false: a graphite rod is a conductor. (a) True (b) False
34. 34.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
35. 35.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
36. 36.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 230 V (d) 9 V
38. 38.Which of these means the circuit is open? (a) a wire has come loose (b) all wires are joined (c) the loop is complete (d) the switch is ON
39. 39.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
40. 40.Which of these gives us electricity? (a) a mobile phone (b) a refrigerator (c) a computer (d) a wind turbine

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