Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 919 · 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 circuit has a used-up (dead) 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 rubber band. Does the bulb glow? (a) No (b) Yes
2. 2.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) bury them in soil (d) give them for recycling
3. 3.Which of these mainly gives out heat? (a) a tube light (b) a room heater (c) a table fan (d) an electric toy car
4. 4.True or false: a glass marble is an insulator. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a copper wire (b) a paper strip (c) a glass marble (d) a wooden stick
6. 6.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a push button (d) a reed switch
7. 7.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) light (d) sound
8. 8.⚡ What does a street light mainly change electricity into? (a) heat (b) sound (c) movement (d) light
9. 9.⚡ What does an electric drill mainly change electricity into? (a) light (b) sound (c) movement (d) heat
10. 10.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
11. 11.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
12. 12.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) the loop is complete (d) all wires are joined
13. 13.Which of these is not safe? (a) build with an adult near (b) open a phone charger (c) take cells out after use (d) dry your hands first
14. 14.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a brass key (d) a paper strip
15. 15.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
17. 17.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
18. 18.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) resistor (b) diode (c) capacitor (d) battery
19. 19.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
20. 20.Which of these is not safe? (a) stay away from pylons (b) fly a kite near wires (c) take cells out after use (d) stop if a part gets hot
21. 21.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
22. 22.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
23. 23.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
24. 24.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) battery (b) diode (c) motor (d) LED
25. 25.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) resistor (b) capacitor (c) bulb (d) LED
26. 26.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it is just untidy (c) it spoils the paint (d) water carries current
27. 27.Which of these is a conductor? (a) a cotton thread (b) a steel coin (c) a glass marble (d) a rubber eraser
28. 28.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
30. 30.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
31. 31.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a slide switch (c) a push button (d) a reed switch
32. 32.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
33. 33.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
35. 35.🔍 Which is the odd one out? (a) a table fan (b) an electric drill (c) an electric toy car (d) a school bell
36. 36.What does a reed switch do? (a) springs back when let go (b) slides side to side (c) closes near a magnet (d) closes when tipped over
37. 37.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
38. 38.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: a tube light mainly gives out light. (a) False (b) True
40. 40.🔋 4 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)? =

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