Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 419 · 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.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
2. 2.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
3. 3.Which of these is safe? (a) open a phone charger (b) touch a switch when wet (c) fly kites in open fields (d) climb an electric pole
4. 4.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) a full circuit (d) an open circuit
5. 5.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
6. 6.Which of these is true of a series circuit? (a) bulbs share the voltage (b) many paths for current (c) used in house wiring (d) own switch for each bulb
7. 7.What does a toggle switch do? (a) slides side to side (b) springs back when let go (c) works only while pressed (d) stays where you flip it
8. 8.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
9. 9.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) resistor (b) junction (c) diode (d) ammeter
10. 10.🔦 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 band. Does the bulb glow? (a) Yes (b) No
11. 11.True or false: to use a cable with cuts is not safe. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) a rubber band (b) a dry cork (c) a brass key (d) a cotton thread
13. 13.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.Which of these mainly makes sound? (a) a torch (b) a room heater (c) a siren (d) a rice cooker
16. 16.Which of these mainly gives out light? (a) an LED lamp (b) a rice cooker (c) an electric kettle (d) a buzzer
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the shorter line (d) the longer line
18. 18.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
19. 19.🔋 How many 1.5 V cells must be joined in series to give 12 V?
20. 20.True or false: to fly kites in open fields is not safe. (a) True (b) False
21. 21.True or false: “a single current path” is true of a series circuit. (a) False (b) True
22. 22.Which of these mainly gives out heat? (a) a night lamp (b) a table fan (c) a toaster (d) a loudspeaker
23. 23.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
24. 24.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
25. 25.Which of these is safe? (a) fly a kite near wires (b) poke things in a socket (c) touch a fallen wire (d) take cells out after use
26. 26.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) many paths for current
27. 27.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
30. 30.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.💡 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 2 glow? (a) Yes (b) No
32. 32.True or false: a slide switch works only while pressed. (a) False (b) True
33. 33.🔋 How many 1.5 V cells must be joined in series to give 3 V?
34. 34.💡 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
35. 35.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False
36. 36.Which of these is a conductor? (a) a woollen thread (b) a brass key (c) a cotton thread (d) a ceramic cup
37. 37.🔍 Which is the odd one out? (a) a toaster (b) a night lamp (c) a tube light (d) a torch
38. 38.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
39. 39.🔦 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) Yes (b) No
40. 40.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =

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