Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 517 · 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) movement energy (b) sound energy (c) chemical energy (d) light energy
2. 2.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
3. 3.Which of these mainly makes sound? (a) a buzzer (b) a tube light (c) a table fan (d) a room heater
4. 4.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
5. 5.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
6. 6.🔍 Which is the odd one out? (a) a school bell (b) a siren (c) a room heater (d) a doorbell
7. 7.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
9. 9.Which of these mainly gives out light? (a) a torch (b) a room heater (c) a toaster (d) a ceiling fan
10. 10.⚡ What does a tube light mainly change electricity into? (a) movement (b) sound (c) light (d) heat
11. 11.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
12. 12.Which drawing is the symbol for a battery? (a) two or more cell symbols (b) a long and a short line (c) one tall, one short bar (d) triangle, bar and arrows
13. 13.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
14. 14.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) the same voltage (d) no voltage
15. 15.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) never (c) only when both are OFF (d) only when both are ON
16. 16.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) sound energy (c) electrical energy (d) nuclear energy
17. 17.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) one bulb out, all go out (d) many paths for current
18. 18.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.Which drawing is the symbol for a motor? (a) a circle with an X in it (b) a circle with M inside (c) a circle with V inside (d) a plain rectangle
20. 20.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a plug top (d) a bulb
21. 21.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken
22. 22.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
23. 23.True or false: two or more cell symbols is the symbol for a bulb. (a) True (b) False
24. 24.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
25. 25.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a wire has come loose (d) all wires are joined
26. 26.🔦 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 copper wire. Does the bulb glow? (a) Yes (b) No
27. 27.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
28. 28.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
29. 29.🔘 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 OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
30. 30.True or false: a circle with V inside is the symbol for a wire. (a) False (b) True
31. 31.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
32. 32.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is OFF (d) the switch is ON
33. 33.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) changes the voltage (d) opens or closes the loop
36. 36.🔍 Which is the odd one out? (a) fly kites in open fields (b) keep drinks far away (c) take cells out after use (d) touch a switch when wet
37. 37.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
38. 38.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
39. 39.🔋 How many 3 V cells must be joined in series to give 18 V?
40. 40.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) water drops (d) dust particles

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids