Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 461 · 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.⚡ What does an electric toy car mainly change electricity into? (a) light (b) movement (c) heat (d) sound
2. 2.What does a tilt switch do? (a) flips up or down (b) springs back when let go (c) slides side to side (d) closes when tipped over
3. 3.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
4. 4.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire is cut (c) the switch is OFF (d) all wires are joined
5. 5.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
6. 6.⚡ What does an electric drill mainly change electricity into? (a) movement (b) light (c) heat (d) sound
7. 7.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) an open circuit (d) a closed circuit
8. 8.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a push button (d) a tilt switch
9. 9.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
10. 10.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) wait and watch (d) shout for an adult
11. 11.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
13. 13.Which of these is not safe? (a) take cells out after use (b) stop if a part gets hot (c) climb an electric pole (d) build with an adult near
14. 14.Which of these is a conductor? (a) a cotton thread (b) a plastic ruler (c) a steel coin (d) a ceramic cup
15. 15.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.💡 2 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?
17. 17.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
18. 18.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
19. 19.Which drawing is the symbol for a resistor? (a) a long and a short line (b) one tall, one short bar (c) two equal parallel lines (d) a plain rectangle
20. 20.🔍 Which is the odd one out? (a) take cells out after use (b) stay away from pylons (c) stop if a part gets hot (d) climb an electric pole
21. 21.🔦 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
22. 22.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
23. 23.What does a toggle switch do? (a) closes when tipped over (b) stays where you flip it (c) springs back when let go (d) works only while pressed
24. 24.Which of these means the circuit is closed? (a) the switch is OFF (b) a cell is taken out (c) a wire has come loose (d) the switch is ON
25. 25.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a complete loop (d) a broken path
26. 26.🔍 Which is the odd one out? (a) take cells out after use (b) touch a fallen wire (c) stay away from pylons (d) keep drinks far away
27. 27.Which drawing is the symbol for a junction? (a) a straight line (b) a dot where wires meet (c) a long and a short line (d) a circle with V inside
28. 28.🔍 Which is the odd one out? (a) a siren (b) a loudspeaker (c) a doorbell (d) a room heater
29. 29.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
30. 30.🔍 Which is the odd one out? (a) a paper strip (b) a ceramic cup (c) a safety pin (d) a rubber band
31. 31.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
32. 32.True or false: to touch a fallen wire is safe. (a) True (b) False
33. 33.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
35. 35.Which of these gives us electricity? (a) a washing machine (b) a water pump (c) a mobile phone (d) a bicycle dynamo
36. 36.Which of these is an insulator? (a) a dry cork (b) a metal paper clip (c) a copper wire (d) a safety pin
37. 37.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
38. 38.Which of these is safe? (a) fly a kite near wires (b) open a phone charger (c) use small battery cells (d) use mains for a project
39. 39.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator

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