Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 46 · 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.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
2. 2.Which drawing is the symbol for a bulb? (a) a small empty box (b) a circle with a cross (c) a circle with V inside (d) a line lifted at a gap
3. 3.🔍 Which is the odd one out? (a) a metal paper clip (b) a copper wire (c) a paper strip (d) a steel coin
4. 4.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
5. 5.Which of these gives us electricity? (a) a water pump (b) a refrigerator (c) a washing machine (d) a battery
6. 6.🔍 Which is the odd one out? (a) a brass key (b) a rubber eraser (c) a copper wire (d) a steel spoon
7. 7.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.True or false: a siren mainly gives out heat. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) use small battery cells (b) poke things in a socket (c) use mains for a project (d) touch a switch when wet
10. 10.🔘 Which kind of switch springs back when let go? (a) a push button (b) a toggle switch (c) a tilt switch (d) a slide switch
11. 11.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
12. 12.True or false: to use a cable with cuts is safe. (a) True (b) False
13. 13.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) motor (c) voltmeter (d) capacitor
14. 14.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) a wire is cut (d) the switch is OFF
15. 15.Which of these is safe? (a) throw cells in a fire (b) use mains for a project (c) use small battery cells (d) poke things in a socket
16. 16.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) movement (c) light (d) heat
17. 17.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic makes current (d) plastic is an insulator
18. 18.🔋 4 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
20. 20.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) only when both are OFF (c) never (d) when either is ON
21. 21.💡 6 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?
22. 22.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
23. 23.🔋 5 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
24. 24.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
25. 25.Which of these is true of a parallel circuit? (a) many paths for current (b) bulbs share the voltage (c) a break stops every bulb (d) a single current path
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) no voltage (d) the same voltage
28. 28.Which of these gives us electricity? (a) a wind turbine (b) a mobile phone (c) a water pump (d) a refrigerator
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
30. 30.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
31. 31.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the metal tip (d) the steel shaft
32. 32.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) bulb (b) capacitor (c) diode (d) voltmeter
34. 34.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) wind energy
35. 35.What does a reed switch do? (a) closes near a magnet (b) springs back when let go (c) slides side to side (d) stays where you flip it
36. 36.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 1.5 V (c) 230 V (d) 12 V
37. 37.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) voltmeter (c) cell (d) junction
38. 38.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
39. 39.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) diode (b) battery (c) junction (d) resistor
40. 40.🔋 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)? =

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