Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 978 · 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.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) wait and watch (c) pour water on them (d) pull them by the hand
2. 2.Which of these gives us electricity? (a) a computer (b) a mobile phone (c) an air conditioner (d) a battery
3. 3.Which of these mainly gives out light? (a) a mixer grinder (b) a tube light (c) a doorbell (d) an electric toy car
4. 4.💡 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. All the bulbs are in place. How many bulbs glow?
5. 5.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are OFF (d) when both are ON
6. 6.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
7. 7.True or false: a ceramic cup is a conductor. (a) True (b) False
8. 8.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) own switch for each bulb (d) bulbs share the voltage
10. 10.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
11. 11.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire is cut (c) a wire has come loose (d) all wires are joined
12. 12.🔦 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 rubber eraser. Does the bulb glow? (a) No (b) Yes
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
14. 14.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a circle with M inside (c) a straight line (d) a long and a short line
15. 15.True or false: triangle against a bar is the symbol for a voltmeter. (a) False (b) True
16. 16.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
17. 17.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
18. 18.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a stranger online (c) a younger child (d) a trusted adult
19. 19.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
20. 20.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
21. 21.🔍 Which is the odd one out? (a) keep drinks far away (b) fly a kite near wires (c) build with an adult near (d) stop if a part gets hot
22. 22.True or false: a steel coin is a conductor. (a) False (b) True
23. 23.💡 6 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. Bulbs 1 and 4 are taken out of their holders. How many bulbs glow?
24. 24.True or false: to use mains for a project is not safe. (a) True (b) False
25. 25.Which of these is not safe? (a) take cells out after use (b) use small battery cells (c) stay away from pylons (d) poke things in a socket
26. 26.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) photons (d) electrons
27. 27.🔍 Which is the odd one out? (a) open a phone charger (b) build with an adult near (c) poke things in a socket (d) climb an electric pole
28. 28.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) a magnet (c) sound (d) electric current
29. 29.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
30. 30.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
31. 31.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) double the voltage (d) the same voltage
32. 32.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) resistor (b) switch (c) ammeter (d) wire
33. 33.⚡ What does a room heater mainly change electricity into? (a) movement (b) heat (c) sound (d) light
34. 34.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
35. 35.What does a push button do? (a) slides side to side (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
36. 36.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
37. 37.💡 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 2 is taken out of its holder. How many bulbs glow?
38. 38.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) all wires are joined (d) the loop is complete
39. 39.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) closes near a magnet (d) stays where you flip it

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