Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 899 · 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.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?
2. 2.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.True or false: to touch a fallen wire is not safe. (a) True (b) False
4. 4.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
5. 5.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) both of them (c) it does not matter (d) none
6. 6.🔍 Which is the odd one out? (a) an electric toy car (b) a table fan (c) a street light (d) a ceiling fan
7. 7.True or false: a ceramic cup is a conductor. (a) True (b) False
8. 8.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
9. 9.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) in parallel (d) not joined
11. 11.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) ammeter (b) wire (c) motor (d) cell
12. 12.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when either is ON (d) when both are ON
13. 13.Which drawing is the symbol for a battery? (a) two equal parallel lines (b) a circle with an X in it (c) triangle, bar and arrows (d) many long-short pairs
14. 14.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) a single current path (d) used in house wiring
15. 15.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) No (b) Yes
16. 16.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
17. 17.🔘 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?
18. 18.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
19. 19.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
20. 20.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) switch (b) bulb (c) motor (d) resistor
21. 21.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
22. 22.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
23. 23.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.🔋 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)? =
26. 26.Which of these is an insulator? (a) a plastic straw (b) a copper wire (c) an iron nail (d) a safety pin
27. 27.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) throw them in a fire (d) cut them open
28. 28.Which drawing is the symbol for a switch? (a) two equal parallel lines (b) a line lifted at a gap (c) two or more cell symbols (d) a circle with V inside
29. 29.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
30. 30.🔘 Which kind of switch slides side to side? (a) a push button (b) a toggle switch (c) a reed switch (d) a slide switch
31. 31.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a push button
32. 32.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
33. 33.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
34. 34.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
35. 35.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
36. 36.What does a toggle switch do? (a) slides side to side (b) springs back when let go (c) stays where you flip it (d) works only while pressed
37. 37.🔍 Which is the odd one out? (a) use a cable with cuts (b) touch a fallen wire (c) fly a kite near wires (d) dry your hands first
38. 38.Which of these means the circuit is closed? (a) the switch is OFF (b) all wires are joined (c) a wire is cut (d) a cell is taken out
39. 39.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
40. 40.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No

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