Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 849 · 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.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
2. 2.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.True or false: a plastic straw is a conductor. (a) True (b) False
4. 4.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a fuse or MCB (d) a bulb
5. 5.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a series circuit (c) an open circuit (d) a closed circuit
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
7. 7.True or false: a slide switch slides side to side. (a) False (b) True
8. 8.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
9. 9.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
10. 10.Which of these uses electricity? (a) a wind turbine (b) a battery (c) a washing machine (d) a generator
11. 11.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.💡 3 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?
13. 13.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
15. 15.True or false: a dry cork is an insulator. (a) True (b) False
16. 16.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) triangle, bar and arrows (c) two or more cell symbols (d) triangle against a bar
17. 17.🔘 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
18. 18.🔦 A circuit has a used-up (dead) 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 plastic straw. Does the bulb glow? (a) No (b) Yes
19. 19.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
20. 20.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a slide switch (c) a push button (d) a toggle switch
21. 21.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
22. 22.True or false: a circle with an X in it is the symbol for a motor. (a) False (b) True
23. 23.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
24. 24.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire is cut (c) the loop is complete (d) the switch is OFF
25. 25.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
26. 26.🔍 Which is the odd one out? (a) a water heater (b) a toaster (c) a rice cooker (d) a street light
27. 27.⚡ What does an electric toy car mainly change electricity into? (a) light (b) sound (c) movement (d) heat
28. 28.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
29. 29.What does a slide switch do? (a) flips up or down (b) stays where you flip it (c) slides side to side (d) works only while pressed
30. 30.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
31. 31.Which of these is a conductor? (a) a woollen thread (b) a plastic ruler (c) a rubber band (d) a steel spoon
32. 32.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
34. 34.Which drawing is the symbol for an ammeter? (a) a long and a short line (b) a circle with V inside (c) a circle with M inside (d) a circle with A inside
35. 35.🔍 Which is the odd one out? (a) a mixer grinder (b) a ceiling fan (c) an electric toy car (d) a siren
36. 36.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) dotted circles (d) little stars
37. 37.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
38. 38.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
40. 40.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end

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