Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 26 · 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.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
2. 2.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
3. 3.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a closed circuit (c) a full circuit (d) an open circuit
4. 4.True or false: to fly a kite near wires is safe. (a) False (b) True
5. 5.🔦 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 steel spoon. Does the bulb glow? (a) No (b) Yes
6. 6.Which of these is not safe? (a) open a phone charger (b) dry your hands first (c) keep drinks far away (d) take cells out after use
7. 7.🔍 Which is the odd one out? (a) a night lamp (b) a torch (c) a buzzer (d) an LED lamp
8. 8.Which of these is not safe? (a) stay away from pylons (b) use a cable with cuts (c) build with an adult near (d) keep drinks far away
9. 9.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
10. 10.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
11. 11.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
12. 12.🔋 5 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)? =
13. 13.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
14. 14.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔍 Which is the odd one out? (a) an LED lamp (b) a traffic signal (c) a street light (d) an exhaust fan
16. 16.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
17. 17.Which of these mainly makes movement? (a) an electric iron (b) a water heater (c) a doorbell (d) a table fan
18. 18.True or false: to keep drinks far away is safe. (a) True (b) False
19. 19.🔘 A bulb and a cell are joined through 6 switches on 6 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
20. 20.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
21. 21.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
22. 22.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) own switch for each bulb (d) each gets the full volts
23. 23.Which of these is an insulator? (a) a wooden stick (b) a graphite rod (c) a copper wire (d) aluminium foil
24. 24.🔍 Which is the odd one out? (a) an iron nail (b) a graphite rod (c) a woollen thread (d) a safety pin
25. 25.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
26. 26.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
27. 27.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
28. 28.True or false: to use a cable with cuts is not safe. (a) False (b) True
29. 29.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
30. 30.True or false: a rice cooker mainly gives out heat. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a traffic signal (b) an LED lamp (c) a night lamp (d) a mixer grinder
32. 32.🔘 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
33. 33.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) light (c) heat (d) movement
34. 34.🔘 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) Yes (b) No
35. 35.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
36. 36.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
37. 37.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
38. 38.Which of these is not safe? (a) use mains for a project (b) build with an adult near (c) fly kites in open fields (d) use small battery cells
39. 39.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
40. 40.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity

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