Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 8 · 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.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
3. 3.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a push button (c) a slide switch (d) a toggle switch
4. 4.Which of these is not safe? (a) fly kites in open fields (b) use a cable with cuts (c) take cells out after use (d) dry your hands first
5. 5.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
6. 6.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
7. 7.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in series (d) in parallel
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
10. 10.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one bulb out, all go out (d) own switch for each bulb
11. 11.🔋 How many 2 V cells must be joined in series to give 8 V?
12. 12.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a cell is taken out (c) a wire is cut (d) the switch is ON
13. 13.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) voltmeter (c) capacitor (d) cell
14. 14.Which drawing is the symbol for a bulb? (a) a line lifted at a gap (b) a circle with an X in it (c) a long and a short line (d) many long-short pairs
15. 15.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
17. 17.True or false: a push button springs back when let go. (a) False (b) True
18. 18.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
19. 19.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) one out, the rest glow (d) each gets the full volts
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
21. 21.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
22. 22.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
23. 23.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) diode (b) junction (c) capacitor (d) bulb
25. 25.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) ammeter (b) motor (c) junction (d) LED
26. 26.🔦 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 cotton thread. Does the bulb glow? (a) Yes (b) No
27. 27.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 230 V (c) 15 V (d) 0.5 V
28. 28.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
29. 29.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
30. 30.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) motor (b) diode (c) voltmeter (d) battery
31. 31.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) water drops (d) electrons
32. 32.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
33. 33.⚡ What does a table fan mainly change electricity into? (a) heat (b) movement (c) sound (d) light
34. 34.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) a mains extension board (d) an inverter socket
35. 35.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
36. 36.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
37. 37.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a circle with M inside (c) many long-short pairs (d) a circle with an X in it
38. 38.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when both are OFF (d) when either is ON
39. 39.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.🔍 Which is the odd one out? (a) fly a kite near wires (b) climb an electric pole (c) use a cable with cuts (d) stay away from pylons

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