Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 991 · 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.Which of these mainly makes sound? (a) a night lamp (b) a tube light (c) a ceiling fan (d) a siren
2. 2.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) no voltage (d) a bigger voltage
3. 3.💡 2 identical bulbs are joined in series 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.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
6. 6.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
7. 7.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) cell (c) resistor (d) LED
8. 8.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
9. 9.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
10. 10.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when either is ON (d) when both are OFF
11. 11.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
12. 12.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
14. 14.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
17. 17.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
18. 18.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
19. 19.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) one bulb out, all go out (d) a break stops every bulb
20. 20.🔍 Which is the odd one out? (a) a plastic ruler (b) a safety pin (c) a copper wire (d) aluminium foil
21. 21.Which of these is a conductor? (a) a plastic ruler (b) a rubber band (c) a plastic straw (d) a steel coin
22. 22.🔍 Which is the odd one out? (a) a mixer grinder (b) a night lamp (c) a traffic signal (d) a street light
23. 23.Which of these is safe? (a) keep drinks far away (b) use mains for a project (c) touch a switch when wet (d) open a phone charger
24. 24.Which drawing is the symbol for a battery? (a) a plain rectangle (b) a straight line (c) many long-short pairs (d) triangle, bar and arrows
25. 25.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.⚠️ 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 short circuit (d) a parallel circuit
27. 27.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
28. 28.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) many paths for current (d) bulbs share the voltage
29. 29.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
30. 30.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) resistor (b) cell (c) battery (d) voltmeter
31. 31.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
32. 32.Which of these is an insulator? (a) a graphite rod (b) a metal paper clip (c) a plastic ruler (d) an iron nail
33. 33.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) cell (b) diode (c) capacitor (d) switch
34. 34.🔍 Which is the odd one out? (a) throw cells in a fire (b) build with an adult near (c) open a phone charger (d) poke things in a socket
35. 35.True or false: to touch a fallen wire is not safe. (a) False (b) True
36. 36.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
37. 37.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
38. 38.🔍 Which is the odd one out? (a) build with an adult near (b) take cells out after use (c) fly kites in open fields (d) throw cells in a fire
39. 39.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) one for each bulb (d) none
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they explode (d) they get dimmer

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