Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 156 · 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.🔦 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 plastic straw. Does the bulb glow? (a) No (b) Yes
2. 2.🔍 Which is the odd one out? (a) stay away from pylons (b) fly kites in open fields (c) build with an adult near (d) poke things in a socket
3. 3.True or false: to use small battery cells is not safe. (a) False (b) True
4. 4.Which of these uses electricity? (a) a wind turbine (b) a battery (c) a refrigerator (d) a power station
5. 5.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
6. 6.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 0.5 V (d) 1.5 V
7. 7.🔋 7 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)? =
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
9. 9.True or false: a rubber band is a conductor. (a) True (b) False
10. 10.True or false: a glass marble is a conductor. (a) False (b) True
11. 11.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) nobody (d) a stranger online
12. 12.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
13. 13.Which of these is a conductor? (a) a cotton thread (b) a paper strip (c) a plastic ruler (d) a graphite rod
14. 14.True or false: a doorbell mainly makes sound. (a) False (b) True
15. 15.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
16. 16.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) heat (c) light (d) sound
17. 17.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
18. 18.True or false: to use small battery cells is safe. (a) False (b) True
19. 19.💡 3 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. Does bulb 1 glow? (a) Yes (b) No
20. 20.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) one bulb out, all go out (d) own switch for each bulb
21. 21.What does a push button do? (a) flips up or down (b) closes when tipped over (c) springs back when let go (d) closes near a magnet
22. 22.🔍 Which is the odd one out? (a) a metal paper clip (b) a rubber eraser (c) a steel spoon (d) aluminium foil
23. 23.Which of these mainly gives out light? (a) a toaster (b) a mixer grinder (c) a tube light (d) a table fan
24. 24.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) switch (b) LED (c) cell (d) wire
25. 25.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
26. 26.🔍 Which is the odd one out? (a) build with an adult near (b) stay away from pylons (c) use small battery cells (d) touch a fallen wire
27. 27.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
28. 28.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) wire (c) capacitor (d) switch
29. 29.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
30. 30.What does a reed switch do? (a) springs back when let go (b) works only while pressed (c) closes near a magnet (d) stays where you flip it
31. 31.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a closed circuit (c) a series circuit (d) a full circuit
32. 32.🔍 Which is the odd one out? (a) a steel spoon (b) a cotton thread (c) a metal paper clip (d) a graphite rod
33. 33.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a bulb (c) a long wire (d) a fuse or MCB
34. 34.🔍 Which is the odd one out? (a) touch a fallen wire (b) fly kites in open fields (c) poke things in a socket (d) touch a switch when wet
35. 35.🔍 Which is the odd one out? (a) a buzzer (b) a loudspeaker (c) a doorbell (d) a water heater
36. 36.Which of these mainly makes movement? (a) a buzzer (b) a rice cooker (c) an electric drill (d) a traffic signal
37. 37.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) broken (d) cut
38. 38.Which drawing is the symbol for a bulb? (a) a straight line (b) a circle with A inside (c) many long-short pairs (d) a circle with an X in it
39. 39.True or false: a toaster mainly makes movement. (a) True (b) False
40. 40.Which of these uses electricity? (a) a cell (b) a television (c) a battery (d) a generator

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