Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 551 · 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.True or false: a circle with a cross is the symbol for an ammeter. (a) False (b) True
2. 2.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
3. 3.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
5. 5.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) No (b) Yes
7. 7.Which drawing is the symbol for a wire? (a) a circle with A inside (b) a circle with M inside (c) a plain rectangle (d) a straight line
8. 8.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
9. 9.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
10. 10.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a series circuit (d) a closed circuit
11. 11.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) when both are ON (d) never
13. 13.⚡ What does a doorbell mainly change electricity into? (a) light (b) heat (c) movement (d) sound
14. 14.Which of these is a conductor? (a) a plastic straw (b) a woollen thread (c) a dry cork (d) an iron nail
15. 15.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
16. 16.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
18. 18.True or false: a plastic straw is a conductor. (a) False (b) True
19. 19.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
20. 20.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
21. 21.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.Which of these means the circuit is open? (a) the bulb is unscrewed (b) all wires are joined (c) the switch is ON (d) the loop is complete
25. 25.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a slide switch (c) a toggle switch (d) a push button
26. 26.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
27. 27.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
28. 28.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
29. 29.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
30. 30.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
32. 32.🔍 Which is the odd one out? (a) a plastic straw (b) a rubber band (c) a steel spoon (d) a rubber eraser
33. 33.Which drawing is the symbol for a bulb? (a) a circle with a cross (b) a small empty box (c) two equal parallel lines (d) a circle with V inside
34. 34.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
35. 35.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
36. 36.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) resistor (b) ammeter (c) cell (d) battery
37. 37.True or false: to throw cells in a fire is safe. (a) False (b) True
38. 38.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
39. 39.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
40. 40.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes

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