Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 820 · 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.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.💡 4 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. How many bulbs glow?
4. 4.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
5. 5.True or false: a plastic straw is an insulator. (a) True (b) False
6. 6.⚡ What does an electric iron mainly change electricity into? (a) movement (b) light (c) sound (d) heat
7. 7.Which of these mainly makes movement? (a) a torch (b) an electric iron (c) an electric kettle (d) a mixer grinder
8. 8.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
9. 9.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
10. 10.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) sound energy (c) wind energy (d) electrical energy
11. 11.🔍 Which is the odd one out? (a) a toaster (b) a night lamp (c) a room heater (d) a water heater
12. 12.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
13. 13.What does a tilt switch do? (a) closes near a magnet (b) flips up or down (c) springs back when let go (d) closes when tipped over
14. 14.True or false: an LED lamp mainly gives out light. (a) False (b) True
15. 15.Which of these gives us electricity? (a) a television (b) a water pump (c) a bicycle dynamo (d) a computer
16. 16.Which of these is safe? (a) dry your hands first (b) fly a kite near wires (c) use mains for a project (d) poke things in a socket
17. 17.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
18. 18.Which of these mainly gives out heat? (a) a mixer grinder (b) a room heater (c) a street light (d) a loudspeaker
19. 19.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
20. 20.True or false: a street light mainly makes movement. (a) False (b) True
21. 21.True or false: a line lifted at a gap is the symbol for an LED. (a) False (b) True
22. 22.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) an insulator (d) a switch that is ON
24. 24.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
25. 25.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
26. 26.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
27. 27.Which drawing is the symbol for a voltmeter? (a) a circle with a cross (b) a circle with A inside (c) a straight line (d) a circle with V inside
28. 28.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
29. 29.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
30. 30.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) diode (b) switch (c) ammeter (d) capacitor
31. 31.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
32. 32.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a safe circuit (c) a parallel circuit (d) a short circuit
33. 33.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
34. 34.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.🔋 How many 3 V cells must be joined in series to give 9 V?
36. 36.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) half the voltage (d) the same voltage
37. 37.Which of these is a conductor? (a) a cotton thread (b) a rubber band (c) a rubber eraser (d) a brass key
38. 38.🔦 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
39. 39.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
40. 40.🔘 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) Yes (b) No

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