Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 913 · 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. Does the bulb glow? (a) Yes (b) No
2. 2.🔍 Which is the odd one out? (a) take cells out after use (b) fly kites in open fields (c) touch a switch when wet (d) stay away from pylons
3. 3.💡 2 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) No (b) Yes
4. 4.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
5. 5.🔍 Which is the odd one out? (a) a brass key (b) a graphite rod (c) an iron nail (d) a rubber band
6. 6.🔘 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) Yes (b) No
7. 7.Which of these is an insulator? (a) a brass key (b) a steel coin (c) a metal paper clip (d) a paper strip
8. 8.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
9. 9.🔘 Which kind of switch springs back when let go? (a) a push button (b) a reed switch (c) a toggle switch (d) a slide switch
10. 10.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
12. 12.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) movement (c) light (d) sound
13. 13.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
14. 14.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
15. 15.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a fuse or MCB (c) a plug top (d) a long wire
16. 16.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water carries current (d) water makes it cold
17. 17.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
19. 19.Which of these is safe? (a) climb an electric pole (b) touch a switch when wet (c) use a cable with cuts (d) take cells out after use
20. 20.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) resistor (b) capacitor (c) bulb (d) LED
21. 21.True or false: to dry your hands first is not safe. (a) True (b) False
22. 22.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) when either is ON (d) never
24. 24.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) shout for an adult (c) pour water on them (d) pull them by the hand
25. 25.Which drawing is the symbol for a diode? (a) two or more cell symbols (b) a straight line (c) triangle against a bar (d) triangle, bar and arrows
26. 26.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) Yes (b) No
27. 27.Which of these uses electricity? (a) a cell (b) a power station (c) a wind turbine (d) a water pump
28. 28.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
29. 29.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
30. 30.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a line lifted at a gap (c) a circle with A inside (d) triangle, bar and arrows
31. 31.True or false: a metal paper clip is a conductor. (a) False (b) True
32. 32.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a safe circuit (c) a short circuit (d) a parallel circuit
33. 33.True or false: to use a cable with cuts is safe. (a) True (b) False
34. 34.Which drawing is the symbol for an ammeter? (a) a line lifted at a gap (b) a long and a short line (c) triangle, bar and arrows (d) a circle with A inside
35. 35.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) voltmeter (c) resistor (d) wire
36. 36.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
37. 37.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
38. 38.True or false: a straight line is the symbol for a motor. (a) False (b) True
39. 39.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
40. 40.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe

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