Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 802 · 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.🔋 6 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)? =
2. 2.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
3. 3.💡 2 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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
4. 4.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) not joined (d) in parallel
5. 5.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
6. 6.Which of these uses electricity? (a) a power station (b) a cell (c) a mobile phone (d) a battery
7. 7.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
8. 8.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
9. 9.🔘 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 ON and B is OFF. Does the bulb glow? (a) Yes (b) No
10. 10.💡 2 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 2 glow? (a) No (b) Yes
11. 11.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
12. 12.🔦 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) Yes (b) No
13. 13.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
14. 14.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) the bulb is unscrewed (d) all wires are joined
15. 15.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit
17. 17.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
18. 18.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.Which drawing is the symbol for a bulb? (a) a plain rectangle (b) a circle with a cross (c) one tall, one short bar (d) a circle with M inside
20. 20.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
21. 21.🔍 Which is the odd one out? (a) use a cable with cuts (b) fly kites in open fields (c) touch a switch when wet (d) use mains for a project
22. 22.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a closed circuit (c) a full circuit (d) a series circuit
23. 23.🔍 Which is the odd one out? (a) a ceiling fan (b) a table fan (c) an electric iron (d) an exhaust fan
24. 24.True or false: a push button flips up or down. (a) False (b) True
25. 25.Which drawing is the symbol for a motor? (a) a circle with A inside (b) triangle, bar and arrows (c) a circle with M inside (d) a straight line
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
28. 28.Which of these is a conductor? (a) a dry cork (b) a rubber band (c) a ceramic cup (d) a copper wire
29. 29.Which of these is safe? (a) open a phone charger (b) touch a switch when wet (c) use a cable with cuts (d) dry your hands first
30. 30.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
32. 32.Which of these is safe? (a) throw cells in a fire (b) stop if a part gets hot (c) touch a fallen wire (d) poke things in a socket
33. 33.💡 6 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 3 glow? (a) No (b) Yes
34. 34.⚡ What does a street light mainly change electricity into? (a) light (b) movement (c) sound (d) heat
35. 35.🔍 Which is the odd one out? (a) a plastic ruler (b) a graphite rod (c) a woollen thread (d) a ceramic cup
36. 36.True or false: a safety pin is an insulator. (a) True (b) False
37. 37.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a copper wire (b) a plastic ruler (c) a glass marble (d) a ceramic cup
39. 39.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
40. 40.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are ON (d) when both are OFF

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