Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 910 · 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.Which of these means the circuit is closed? (a) all wires are joined (b) a wire is cut (c) the bulb is unscrewed (d) a wire has come loose
2. 2.True or false: triangle, bar and arrows is the symbol for a motor. (a) False (b) True
3. 3.Which of these means the circuit is open? (a) all wires are joined (b) a cell is taken out (c) the loop is complete (d) the switch is ON
4. 4.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
5. 5.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
6. 6.True or false: a circle with V inside is the symbol for a junction. (a) False (b) True
7. 7.🔦 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
8. 8.🔍 Which is the odd one out? (a) keep drinks far away (b) touch a fallen wire (c) open a phone charger (d) touch a switch when wet
9. 9.True or false: a rubber eraser is an insulator. (a) True (b) False
10. 10.Which of these mainly gives out heat? (a) a tube light (b) a buzzer (c) a toaster (d) an LED lamp
11. 11.True or false: a paper strip is a conductor. (a) True (b) False
12. 12.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a full circuit (d) a closed circuit
13. 13.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a bigger voltage (d) a smaller voltage
14. 14.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a slide switch (c) a push button (d) a reed switch
15. 15.🔦 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) Yes (b) No
16. 16.🔋 3 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a broken path (d) a plastic gap
18. 18.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 230 V (d) 9 V
19. 19.🔌 Which metal is used for most electric wires at home? (a) glass (b) rubber (c) copper (d) plastic
20. 20.🔘 A bulb and a cell are joined through 6 switches on 6 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?
21. 21.True or false: a toggle switch stays where you flip it. (a) False (b) True
22. 22.🔦 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) No (b) Yes
23. 23.Which of these is an insulator? (a) a brass key (b) an iron nail (c) a plastic straw (d) a steel spoon
24. 24.Which of these gives us electricity? (a) a battery (b) a computer (c) a mobile phone (d) a refrigerator
25. 25.Which of these is an insulator? (a) a safety pin (b) aluminium foil (c) a rubber band (d) a graphite rod
26. 26.Which of these is an insulator? (a) aluminium foil (b) a safety pin (c) a copper wire (d) a rubber eraser
27. 27.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
28. 28.Which of these gives us electricity? (a) a water pump (b) a computer (c) a wind turbine (d) a mobile phone
29. 29.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
30. 30.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
31. 31.True or false: a night lamp mainly gives out light. (a) False (b) True
32. 32.Which of these gives us electricity? (a) a refrigerator (b) an air conditioner (c) a bicycle dynamo (d) a mobile phone
33. 33.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
34. 34.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
35. 35.💡 4 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 2 are taken out of their holders. Does bulb 4 glow? (a) No (b) Yes
36. 36.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
37. 37.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
38. 38.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
39. 39.True or false: many long-short pairs is the symbol for a motor. (a) False (b) True
40. 40.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)

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