Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 891 · 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.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
2. 2.True or false: to stop if a part gets hot is not safe. (a) True (b) False
3. 3.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
4. 4.Which drawing is the symbol for a switch? (a) two equal parallel lines (b) a line lifted at a gap (c) many long-short pairs (d) a dot where wires meet
5. 5.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
6. 6.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) throw them in a fire (d) bury them in soil
7. 7.Which of these mainly gives out heat? (a) a rice cooker (b) a buzzer (c) a siren (d) an electric drill
8. 8.True or false: a slide switch works only while pressed. (a) False (b) True
9. 9.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) movement energy (d) chemical energy
12. 12.🔍 Which is the odd one out? (a) a cotton thread (b) a rubber eraser (c) a dry cork (d) a safety pin
13. 13.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
14. 14.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
15. 15.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
16. 16.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
17. 17.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
18. 18.Which of these is a conductor? (a) a steel coin (b) a cotton thread (c) a plastic straw (d) a rubber eraser
19. 19.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
20. 20.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
21. 21.🔍 Which is the odd one out? (a) touch a fallen wire (b) keep drinks far away (c) climb an electric pole (d) touch a switch when wet
22. 22.True or false: a brass key is an insulator. (a) False (b) True
23. 23.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) makes electricity (c) changes the voltage (d) stores current
24. 24.True or false: to use mains for a project is safe. (a) True (b) False
25. 25.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) a wire has come loose (d) the switch is OFF
26. 26.⚡ What does a room heater mainly change electricity into? (a) heat (b) light (c) movement (d) sound
27. 27.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
28. 28.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) battery (b) wire (c) diode (d) LED
29. 29.🔍 Which is the odd one out? (a) a steel coin (b) aluminium foil (c) a brass key (d) a cotton thread
30. 30.🔦 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 graphite rod. Does the bulb glow? (a) Yes (b) No
31. 31.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
34. 34.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
36. 36.Which drawing is the symbol for a capacitor? (a) a straight line (b) a circle with V inside (c) a circle with A inside (d) two equal parallel lines
37. 37.True or false: aluminium foil is a conductor. (a) False (b) True
38. 38.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) none (d) two
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) diode (c) ammeter (d) motor

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