Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 245 · 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.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
2. 2.🔘 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 ON, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
3. 3.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
4. 4.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
5. 5.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
6. 6.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
7. 7.What does a push button do? (a) flips up or down (b) works only while pressed (c) slides side to side (d) stays where you flip it
8. 8.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
9. 9.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.Which of these mainly makes sound? (a) a street light (b) an electric iron (c) a doorbell (d) an electric toy car
11. 11.⚡ What does an electric kettle mainly change electricity into? (a) heat (b) movement (c) sound (d) light
12. 12.Which drawing is the symbol for a motor? (a) triangle against a bar (b) many long-short pairs (c) a straight line (d) a circle with M inside
13. 13.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a complete loop (d) a plastic gap
14. 14.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) an open circuit (d) a series circuit
15. 15.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
16. 16.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
17. 17.True or false: to use small battery cells is not safe. (a) False (b) True
18. 18.Which of these is a conductor? (a) a cotton thread (b) a plastic ruler (c) a metal paper clip (d) a woollen thread
19. 19.💡 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
20. 20.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
21. 21.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
22. 22.True or false: a tilt switch slides side to side. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) use small battery cells (b) keep drinks far away (c) stop if a part gets hot (d) open a phone charger
24. 24.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
25. 25.What does a toggle switch do? (a) closes near a magnet (b) works only while pressed (c) springs back when let go (d) flips up or down
26. 26.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
28. 28.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
29. 29.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
30. 30.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
31. 31.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
32. 32.Which of these means the circuit is closed? (a) the switch is OFF (b) the loop is complete (c) a wire has come loose (d) the bulb is unscrewed
33. 33.🔍 Which is the odd one out? (a) use mains for a project (b) touch a switch when wet (c) use small battery cells (d) throw cells in a fire
34. 34.Which of these gives us electricity? (a) a washing machine (b) an air conditioner (c) a bicycle dynamo (d) a computer
35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.⚡ What does a school bell mainly change electricity into? (a) sound (b) heat (c) light (d) movement
38. 38.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
39. 39.True or false: a ceiling fan mainly makes movement. (a) True (b) False
40. 40.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed

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