Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 672 · 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.⚡ What does a table fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
2. 2.True or false: a rubber band is a conductor. (a) True (b) False
3. 3.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
4. 4.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
5. 5.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.Which drawing is the symbol for an LED? (a) two equal parallel lines (b) a small empty box (c) triangle, bar and arrows (d) many long-short pairs
7. 7.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
8. 8.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
9. 9.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) in parallel (d) by Wi-Fi
11. 11.🔍 Which is the odd one out? (a) dry your hands first (b) touch a fallen wire (c) stay away from pylons (d) stop if a part gets hot
12. 12.🔦 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
13. 13.Which drawing is the symbol for a diode? (a) a circle with a cross (b) triangle against a bar (c) two or more cell symbols (d) a circle with M inside
14. 14.True or false: a toggle switch springs back when let go. (a) False (b) True
15. 15.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
16. 16.Which of these uses electricity? (a) a cell (b) an air conditioner (c) a bicycle dynamo (d) a power station
17. 17.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
18. 18.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
19. 19.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
20. 20.🔍 Which is the odd one out? (a) a graphite rod (b) a copper wire (c) an iron nail (d) a wooden stick
21. 21.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) two or more cell symbols (c) one tall, one short bar (d) a circle with A inside
22. 22.💡 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?
23. 23.Which of these is not safe? (a) build with an adult near (b) fly a kite near wires (c) fly kites in open fields (d) stay away from pylons
24. 24.Which of these is safe? (a) stop if a part gets hot (b) poke things in a socket (c) use a cable with cuts (d) touch a fallen wire
25. 25.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
26. 26.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) many paths for current (d) a single current path
27. 27.True or false: to use a cable with cuts is not safe. (a) False (b) True
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
29. 29.What does a toggle switch do? (a) closes near a magnet (b) slides side to side (c) works only while pressed (d) stays where you flip it
30. 30.Which of these mainly gives out light? (a) a rice cooker (b) a room heater (c) a traffic signal (d) a mixer grinder
31. 31.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) motor (b) battery (c) switch (d) wire
32. 32.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
33. 33.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
34. 34.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a closed circuit (d) a series circuit
36. 36.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) own switch for each bulb (d) a single current path
37. 37.True or false: a circle with a cross is the symbol for a wire. (a) True (b) False
38. 38.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
40. 40.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =

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