Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 203 · 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 it safe to dry your hands first? (a) not safe (b) safe
2. 2.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) one bulb out, all go out (d) one out, the rest glow
3. 3.Which drawing is the symbol for a wire? (a) a long and a short line (b) a straight line (c) a dot where wires meet (d) a circle with V inside
4. 4.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) LED (c) capacitor (d) ammeter
5. 5.🔦 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
6. 6.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
8. 8.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
9. 9.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
10. 10.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) the switch is OFF (d) all wires are joined
11. 11.🔘 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
12. 12.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
14. 14.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
15. 15.True or false: a tube light mainly gives out light. (a) False (b) True
16. 16.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a push button (c) a reed switch (d) a toggle switch
17. 17.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) a mixer grinder (b) a table fan (c) an electric drill (d) a tube light
19. 19.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic makes current (d) plastic is a conductor
20. 20.🔍 Which is the odd one out? (a) an iron nail (b) a copper wire (c) aluminium foil (d) a plastic ruler
21. 21.Which of these is a conductor? (a) a wooden stick (b) a plastic straw (c) a glass marble (d) a safety pin
22. 22.Which of these mainly gives out heat? (a) a loudspeaker (b) a tube light (c) a ceiling fan (d) a rice cooker
23. 23.💡 2 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?
24. 24.True or false: an LED lamp mainly gives out light. (a) False (b) True
25. 25.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) copper (d) glass
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
27. 27.⚡ What does an electric kettle mainly change electricity into? (a) light (b) sound (c) heat (d) movement
28. 28.⚡ What does a table fan mainly change electricity into? (a) light (b) heat (c) sound (d) movement
29. 29.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
30. 30.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
31. 31.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a cell is taken out
32. 32.What does a reed switch do? (a) closes when tipped over (b) flips up or down (c) works only while pressed (d) closes near a magnet
33. 33.🔌 Most metals are good … (a) conductors (b) magnets only (c) batteries (d) insulators
34. 34.Which of these is safe? (a) poke things in a socket (b) touch a switch when wet (c) dry your hands first (d) use a cable with cuts
35. 35.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
36. 36.⚡ What does a water heater mainly change electricity into? (a) sound (b) heat (c) movement (d) light
37. 37.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a safe circuit (c) a parallel circuit (d) an open circuit
38. 38.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
39. 39.What does a toggle switch do? (a) springs back when let go (b) works only while pressed (c) slides side to side (d) flips up or down
40. 40.Which of these is true of a series circuit? (a) each gets the full volts (b) a break stops every bulb (c) many paths for current (d) one out, the rest glow

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