Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 399 · 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 is the odd one out? (a) an iron nail (b) a copper wire (c) a steel spoon (d) a plastic ruler
2. 2.💡 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?
3. 3.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
5. 5.Which of these gives us electricity? (a) a generator (b) a computer (c) a television (d) a water pump
6. 6.Which of these gives us electricity? (a) a washing machine (b) a power station (c) a television (d) a mobile phone
7. 7.🔍 Which is the odd one out? (a) take cells out after use (b) climb an electric pole (c) keep drinks far away (d) dry your hands first
8. 8.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
10. 10.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire is cut (d) the switch is ON
11. 11.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
12. 12.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
13. 13.🔘 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) only when both are ON (d) never
14. 14.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
16. 16.Which of these mainly gives out light? (a) a doorbell (b) a toaster (c) a table fan (d) a traffic signal
17. 17.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a plastic gap (d) a complete loop
18. 18.🔍 Which is the odd one out? (a) poke things in a socket (b) climb an electric pole (c) throw cells in a fire (d) stop if a part gets hot
19. 19.Which drawing is the symbol for a resistor? (a) a small empty box (b) a circle with a cross (c) a line lifted at a gap (d) one tall, one short bar
20. 20.True or false: a plastic straw is a conductor. (a) True (b) False
21. 21.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) double the voltage (d) the same voltage
22. 22.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
23. 23.True or false: to throw cells in a fire is not safe. (a) True (b) False
24. 24.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
25. 25.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
26. 26.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) LED (b) diode (c) cell (d) battery
27. 27.Which of these is an insulator? (a) a steel coin (b) a cotton thread (c) a graphite rod (d) a copper wire
28. 28.True or false: a dry cork is a conductor. (a) True (b) False
29. 29.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
30. 30.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
31. 31.Which of these is not safe? (a) stop if a part gets hot (b) touch a fallen wire (c) keep drinks far away (d) take cells out after use
32. 32.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
34. 34.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
35. 35.💡 4 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. How many bulbs glow?
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.⚡ What does an electric toy car mainly change electricity into? (a) sound (b) light (c) heat (d) movement
38. 38.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
39. 39.🔍 Which is the odd one out? (a) an electric toy car (b) a table fan (c) a ceiling fan (d) a doorbell
40. 40.🔍 Which is the odd one out? (a) a mixer grinder (b) a doorbell (c) a buzzer (d) a siren

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