Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 692 · 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 is the odd one out? (a) build with an adult near (b) poke things in a socket (c) use a cable with cuts (d) use mains for a project
2. 2.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) wire (c) battery (d) motor
3. 3.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
4. 4.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) never (d) only when both are ON
5. 5.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) cell (b) bulb (c) ammeter (d) battery
6. 6.🔘 What does a switch do in a circuit? (a) changes the voltage (b) makes electricity (c) opens or closes the loop (d) stores current
7. 7.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
9. 9.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
10. 10.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
11. 11.Which of these is safe? (a) take cells out after use (b) climb an electric pole (c) poke things in a socket (d) fly a kite near wires
12. 12.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a toggle switch (c) a reed switch (d) a slide switch
13. 13.True or false: to poke things in a socket is safe. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) an iron nail (b) a steel coin (c) a paper strip (d) aluminium foil
15. 15.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) ammeter (b) junction (c) battery (d) cell
16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
17. 17.🔋 8 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)? =
18. 18.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
20. 20.🔦 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) No (b) Yes
21. 21.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a closed circuit (d) a full circuit
22. 22.🔍 Which is the odd one out? (a) a metal paper clip (b) aluminium foil (c) a copper wire (d) a cotton thread
23. 23.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
24. 24.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
25. 25.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
26. 26.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
27. 27.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.💡 6 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?
29. 29.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) a circle with an X in it (c) one tall, one short bar (d) a circle with a cross
30. 30.True or false: a straight line is the symbol for a resistor. (a) False (b) True
31. 31.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
32. 32.True or false: a toggle switch closes when tipped over. (a) True (b) False
33. 33.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
34. 34.🔍 Which is the odd one out? (a) climb an electric pole (b) open a phone charger (c) throw cells in a fire (d) use small battery cells
35. 35.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
36. 36.⚡ What does an electric iron mainly change electricity into? (a) heat (b) sound (c) light (d) movement
37. 37.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
39. 39.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 0.5 V (d) 1.5 V
40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)

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