Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 669 · 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 bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
2. 2.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
3. 3.💡 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
4. 4.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
5. 5.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
6. 6.🔍 Which is the odd one out? (a) a water heater (b) a rice cooker (c) a room heater (d) an exhaust fan
7. 7.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
8. 8.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
9. 9.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) many paths for current (d) a break stops every bulb
10. 10.What does a tilt switch do? (a) slides side to side (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
11. 11.🔍 Which is the odd one out? (a) a water heater (b) a toaster (c) a loudspeaker (d) a room heater
12. 12.True or false: a push button closes when tipped over. (a) True (b) False
13. 13.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.Which of these mainly makes sound? (a) a school bell (b) a rice cooker (c) an electric drill (d) a mixer grinder
15. 15.⚡ What does an electric drill mainly change electricity into? (a) sound (b) light (c) heat (d) movement
16. 16.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
17. 17.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) many paths for current (d) each gets the full volts
18. 18.Which of these gives us electricity? (a) a mobile phone (b) a washing machine (c) a wind turbine (d) a water pump
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) cell (c) diode (d) junction
20. 20.Which of these gives us electricity? (a) a television (b) a water pump (c) a computer (d) a bicycle dynamo
21. 21.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) a bigger voltage (c) no voltage (d) the same voltage
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
23. 23.🔘 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
24. 24.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
25. 25.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
26. 26.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
27. 27.Which drawing is the symbol for a resistor? (a) triangle, bar and arrows (b) a plain rectangle (c) a straight line (d) a long and a short line
28. 28.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
29. 29.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) plastic makes current (d) to make them heavy
30. 30.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
31. 31.🔋 3 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)? =
32. 32.🔍 Which is the odd one out? (a) aluminium foil (b) a graphite rod (c) a metal paper clip (d) a rubber band
33. 33.True or false: a street light mainly makes movement. (a) False (b) True
34. 34.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
37. 37.🔁 What must there be for a current to flow? (a) a complete loop (b) a plastic gap (c) one loose end (d) a broken path
38. 38.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
39. 39.Which drawing is the symbol for an ammeter? (a) one tall, one short bar (b) a circle with a cross (c) a circle with A inside (d) a plain rectangle
40. 40.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) the loop is complete (d) all wires are joined

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