Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 359 · 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.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) bulb (b) LED (c) cell (d) junction
3. 3.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) resistor (c) cell (d) LED
4. 4.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
5. 5.True or false: two or more cell symbols is the symbol for a voltmeter. (a) True (b) False
6. 6.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
8. 8.True or false: “a single current path” is true of a series circuit. (a) False (b) True
9. 9.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
10. 10.Which drawing is the symbol for a bulb? (a) a small empty box (b) many long-short pairs (c) a circle with an X in it (d) a line lifted at a gap
11. 11.🔋 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)? =
12. 12.Which of these is not safe? (a) touch a fallen wire (b) keep drinks far away (c) build with an adult near (d) dry your hands first
13. 13.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
14. 14.🔋 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)? =
15. 15.Which drawing is the symbol for a capacitor? (a) a small empty box (b) two equal parallel lines (c) one tall, one short bar (d) a long and a short line
16. 16.🔍 Which is the odd one out? (a) aluminium foil (b) a steel spoon (c) a graphite rod (d) a paper strip
17. 17.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) an open circuit (c) a closed circuit (d) a series circuit
18. 18.True or false: a circle with V inside is the symbol for a switch. (a) False (b) True
19. 19.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
20. 20.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
21. 21.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
22. 22.Which drawing is the symbol for an LED? (a) a line lifted at a gap (b) a long and a short line (c) triangle, bar and arrows (d) two equal parallel lines
23. 23.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: a straight line is the symbol for a wire. (a) False (b) True
25. 25.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
26. 26.True or false: to touch a switch when wet is not safe. (a) True (b) False
27. 27.Which of these is a conductor? (a) a glass marble (b) a cotton thread (c) a metal paper clip (d) a plastic ruler
28. 28.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
29. 29.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
30. 30.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
31. 31.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) one bulb out, all go out (d) each gets the full volts
32. 32.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) a circle with a cross (c) many long-short pairs (d) one tall, one short bar
33. 33.⚠️ 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) pour water on them (d) shout for an adult
34. 34.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
36. 36.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
37. 37.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) a wire has come loose
38. 38.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
39. 39.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
40. 40.True or false: a slide switch closes when tipped over. (a) False (b) True

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