Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 421 · 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.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.Which of these mainly gives out light? (a) a school bell (b) a toaster (c) an electric iron (d) a traffic signal
3. 3.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) bulbs share the voltage (d) a break stops every bulb
4. 4.True or false: to throw cells in a fire is safe. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) an LED lamp (b) a tube light (c) a school bell (d) a traffic signal
6. 6.True or false: to open a phone charger is safe. (a) False (b) True
7. 7.🔋 6 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)? =
8. 8.🔋 Does an air conditioner give electricity or use electricity? (a) gives electricity (b) uses electricity
9. 9.True or false: a reed switch flips up or down. (a) True (b) False
10. 10.Which of these means the circuit is closed? (a) the switch is ON (b) a wire has come loose (c) a cell is taken out (d) the switch is OFF
11. 11.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
12. 12.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a toggle switch (c) a push button (d) a slide switch
13. 13.Which of these means the circuit is open? (a) the switch is ON (b) the bulb is unscrewed (c) the loop is complete (d) all wires are joined
14. 14.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) opens or closes the loop (d) stores current
15. 15.🔘 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 OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
16. 16.💡 2 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 1 is taken out of its holder. How many bulbs glow?
17. 17.🔘 Which kind of switch closes when tipped over? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
18. 18.Which drawing is the symbol for a junction? (a) a line lifted at a gap (b) a dot where wires meet (c) a circle with A inside (d) a small empty box
19. 19.True or false: many long-short pairs is the symbol for a diode. (a) True (b) False
20. 20.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
21. 21.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) each gets the full volts
22. 22.🔍 Which is the odd one out? (a) a rubber eraser (b) a glass marble (c) a plastic straw (d) a steel spoon
23. 23.🔍 Which is the odd one out? (a) a siren (b) a night lamp (c) a school bell (d) a doorbell
24. 24.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) bulb (c) voltmeter (d) capacitor
25. 25.Which of these mainly gives out heat? (a) an electric iron (b) an LED lamp (c) an exhaust fan (d) a torch
26. 26.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
27. 27.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the metal tip (d) the steel shaft
28. 28.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.Which of these is not safe? (a) build with an adult near (b) fly a kite near wires (c) take cells out after use (d) stop if a part gets hot
30. 30.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
31. 31.🔋 Does a power station give electricity or use electricity? (a) gives electricity (b) uses electricity
32. 32.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
33. 33.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
34. 34.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
35. 35.Which of these is a conductor? (a) a dry cork (b) a woollen thread (c) a metal paper clip (d) a plastic ruler
36. 36.What does a toggle switch do? (a) flips up or down (b) works only while pressed (c) closes near a magnet (d) slides side to side
37. 37.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
38. 38.What does a reed switch do? (a) springs back when let go (b) slides side to side (c) closes near a magnet (d) stays where you flip it
39. 39.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
40. 40.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter

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