Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 161 · 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.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
2. 2.🔍 Which is the odd one out? (a) a torch (b) a night lamp (c) an LED lamp (d) an electric iron
3. 3.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) cell (c) bulb (d) resistor
4. 4.🔍 Which is the odd one out? (a) use mains for a project (b) build with an adult near (c) poke things in a socket (d) touch a switch when wet
5. 5.🔍 Which is the odd one out? (a) a school bell (b) a siren (c) a loudspeaker (d) a rice cooker
6. 6.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
8. 8.Which of these is a conductor? (a) a brass key (b) a glass marble (c) a plastic straw (d) a rubber band
9. 9.🔍 Which is the odd one out? (a) use a cable with cuts (b) use mains for a project (c) fly a kite near wires (d) use small battery cells
10. 10.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) no voltage (d) double the voltage
11. 11.Which of these mainly gives out light? (a) a doorbell (b) a table fan (c) a toaster (d) a tube light
12. 12.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) a single current path (d) one bulb out, all go out
13. 13.Which of these is safe? (a) poke things in a socket (b) climb an electric pole (c) touch a switch when wet (d) fly kites in open fields
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
16. 16.What does a reed switch do? (a) slides side to side (b) flips up or down (c) closes near a magnet (d) stays where you flip it
17. 17.True or false: to open a phone charger is not safe. (a) False (b) True
18. 18.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) many paths for current (c) a break stops every bulb (d) a single current path
19. 19.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) the switch is OFF
20. 20.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
21. 21.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
22. 22.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) all wires are joined (d) a wire is cut
23. 23.🔘 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
24. 24.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
25. 25.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
26. 26.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a wire has come loose (d) all wires are joined
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) No (b) Yes
29. 29.What does a tilt switch do? (a) flips up or down (b) slides side to side (c) works only while pressed (d) closes when tipped over
30. 30.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) capacitor (b) switch (c) LED (d) cell
31. 31.🔘 A bulb and a cell are joined through 3 switches on 3 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?
32. 32.🔍 Which is the odd one out? (a) a brass key (b) a glass marble (c) a steel spoon (d) a copper wire
33. 33.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) heat (c) light (d) movement
34. 34.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
35. 35.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
36. 36.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
37. 37.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
38. 38.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
39. 39.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
40. 40.Which of these is a conductor? (a) a wooden stick (b) a safety pin (c) a ceramic cup (d) a plastic ruler

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