Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 903 · 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: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
2. 2.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) diode (b) switch (c) resistor (d) bulb
3. 3.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.🔦 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
6. 6.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) give them for recycling (d) throw them in a fire
7. 7.Which of these mainly makes movement? (a) a tube light (b) an electric kettle (c) a ceiling fan (d) a doorbell
8. 8.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
9. 9.🔋 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)? =
10. 10.Which of these means the circuit is closed? (a) all wires are joined (b) a cell is taken out (c) a wire has come loose (d) the switch is OFF
11. 11.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
12. 12.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
14. 14.💡 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?
15. 15.⚡ What does a loudspeaker mainly change electricity into? (a) sound (b) movement (c) light (d) heat
16. 16.🔘 A bulb and a cell are joined through 5 switches on 5 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?
17. 17.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) two or more cell symbols (c) a plain rectangle (d) a circle with A inside
18. 18.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
19. 19.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) an open circuit (c) a safe circuit (d) a parallel circuit
20. 20.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
21. 21.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
22. 22.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a toggle switch (c) a push button (d) a reed switch
23. 23.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) wire (b) diode (c) voltmeter (d) capacitor
24. 24.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) a circle with an X in it (c) a dot where wires meet (d) triangle against a bar
25. 25.Which of these uses electricity? (a) a battery (b) a television (c) a wind turbine (d) a power station
26. 26.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
27. 27.🔋 3 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)? =
28. 28.True or false: a toggle switch stays where you flip it. (a) False (b) True
29. 29.Which of these mainly gives out light? (a) a traffic signal (b) a water heater (c) an electric toy car (d) a buzzer
30. 30.True or false: a wooden stick is an insulator. (a) False (b) True
31. 31.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 15 V (d) 1.5 V
32. 32.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is ON (c) the bulb is unscrewed (d) the switch is OFF
34. 34.Which of these mainly gives out heat? (a) a torch (b) a buzzer (c) an electric iron (d) a doorbell
35. 35.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) copper (d) rubber
36. 36.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
37. 37.💡 A battery lights 4 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
38. 38.🔍 Which is the odd one out? (a) touch a fallen wire (b) use mains for a project (c) stop if a part gets hot (d) touch a switch when wet
39. 39.🔍 Which is the odd one out? (a) climb an electric pole (b) keep drinks far away (c) use small battery cells (d) dry your hands first
40. 40.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True

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