Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 250 · 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.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
3. 3.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
4. 4.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
5. 5.🔍 Which is the odd one out? (a) a school bell (b) a table fan (c) a siren (d) a buzzer
6. 6.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
7. 7.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) electric current (d) sound
8. 8.True or false: two equal parallel lines is the symbol for a junction. (a) False (b) True
9. 9.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: a night lamp mainly gives out heat. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) touch a fallen wire (b) build with an adult near (c) throw cells in a fire (d) climb an electric pole
12. 12.True or false: to fly kites in open fields is not safe. (a) False (b) True
13. 13.Which drawing is the symbol for a diode? (a) a small empty box (b) triangle against a bar (c) a circle with A inside (d) a circle with V inside
14. 14.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) a series circuit (d) an open circuit
15. 15.Which drawing is the symbol for a voltmeter? (a) a long and a short line (b) a circle with V inside (c) a dot where wires meet (d) a circle with A inside
16. 16.Which of these is a conductor? (a) a rubber band (b) a glass marble (c) a brass key (d) a rubber eraser
17. 17.🔘 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
18. 18.True or false: to throw cells in a fire is safe. (a) False (b) True
19. 19.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) own switch for each bulb (d) bulbs share the voltage
20. 20.🔍 Which is the odd one out? (a) touch a switch when wet (b) throw cells in a fire (c) use small battery cells (d) use mains for a project
21. 21.True or false: a straight line is the symbol for a battery. (a) True (b) False
22. 22.True or false: a traffic signal mainly gives out light. (a) False (b) True
23. 23.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
24. 24.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
25. 25.Which of these is not safe? (a) stay away from pylons (b) keep drinks far away (c) use small battery cells (d) fly a kite near wires
26. 26.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
27. 27.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
28. 28.Which of these means the circuit is open? (a) a cell is taken out (b) all wires are joined (c) the switch is ON (d) the loop is complete
29. 29.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
30. 30.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
31. 31.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
32. 32.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
33. 33.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
34. 34.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
35. 35.True or false: a toggle switch slides side to side. (a) False (b) True
36. 36.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
37. 37.🔍 Which is the odd one out? (a) a plastic straw (b) a steel spoon (c) a wooden stick (d) a paper strip
38. 38.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
39. 39.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
40. 40.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) flips up or down (d) springs back when let go

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