Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 435 · 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.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is ON (c) a wire is cut (d) the bulb is unscrewed
2. 2.Which of these gives us electricity? (a) an air conditioner (b) a water pump (c) a cell (d) a television
3. 3.True or false: a tilt switch closes near a magnet. (a) True (b) False
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
5. 5.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
6. 6.💡 2 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?
7. 7.True or false: a rubber band is an insulator. (a) True (b) False
8. 8.True or false: to take cells out after use is safe. (a) False (b) True
9. 9.⚡ What does a room heater mainly change electricity into? (a) light (b) heat (c) sound (d) movement
10. 10.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
11. 11.💡 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) brighter (c) the same
12. 12.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) voltmeter (b) LED (c) switch (d) motor
13. 13.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a smaller voltage (d) a bigger voltage
14. 14.🔋 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)? =
15. 15.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
16. 16.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
20. 20.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
21. 21.🔦 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 plastic ruler. Does the bulb glow? (a) No (b) Yes
22. 22.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
23. 23.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
24. 24.True or false: one tall, one short bar is the symbol for a resistor. (a) True (b) False
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
26. 26.🔋 5 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)? =
27. 27.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
28. 28.True or false: a tilt switch closes when tipped over. (a) False (b) True
29. 29.True or false: to stop if a part gets hot is safe. (a) True (b) False
30. 30.🔘 Which kind of switch works only while pressed? (a) a push button (b) a toggle switch (c) a tilt switch (d) a reed switch
31. 31.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
32. 32.🔌 Most metals are good … (a) insulators (b) batteries (c) magnets only (d) conductors
33. 33.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
34. 34.Which drawing is the symbol for a diode? (a) a straight line (b) a circle with V inside (c) a dot where wires meet (d) triangle against a bar
35. 35.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
36. 36.True or false: to build with an adult near is safe. (a) False (b) True
37. 37.🔁 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
38. 38.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
39. 39.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) wire (b) voltmeter (c) switch (d) battery
40. 40.Which of these is an insulator? (a) a cotton thread (b) a copper wire (c) a safety pin (d) a steel spoon

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