Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 157 · 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.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) battery (b) capacitor (c) motor (d) LED
2. 2.🔦 A circuit has a used-up (dead) 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 plastic straw. Does the bulb glow? (a) Yes (b) No
3. 3.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
4. 4.True or false: a slide switch slides side to side. (a) True (b) False
5. 5.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
6. 6.💡 6 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 5 is taken out of its holder. How many bulbs glow?
7. 7.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) ammeter (b) cell (c) capacitor (d) motor
8. 8.Which of these gives us electricity? (a) an air conditioner (b) a washing machine (c) a computer (d) a cell
9. 9.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
10. 10.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
11. 11.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) throw them in a fire (d) give them for recycling
12. 12.True or false: two equal parallel lines is the symbol for an ammeter. (a) False (b) True
13. 13.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
15. 15.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
16. 16.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
17. 17.🔍 Which is the odd one out? (a) touch a fallen wire (b) take cells out after use (c) fly a kite near wires (d) poke things in a socket
18. 18.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
19. 19.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) dotted circles (d) little stars
20. 20.Which of these uses electricity? (a) a wind turbine (b) a battery (c) a television (d) a solar panel
21. 21.🔍 Which is the odd one out? (a) a tube light (b) a buzzer (c) a siren (d) a loudspeaker
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
23. 23.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a toggle switch (c) a push button (d) a reed switch
24. 24.True or false: a straight line is the symbol for a wire. (a) False (b) True
25. 25.Which of these mainly makes movement? (a) an electric toy car (b) a school bell (c) a torch (d) a siren
26. 26.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) double the voltage (d) no voltage
27. 27.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
28. 28.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
29. 29.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) bulb (c) motor (d) ammeter
30. 30.Which of these is safe? (a) open a phone charger (b) climb an electric pole (c) fly kites in open fields (d) touch a fallen wire
31. 31.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a slide switch
32. 32.True or false: to build with an adult near is safe. (a) True (b) False
33. 33.True or false: a circle with an X in it is the symbol for a bulb. (a) False (b) True
34. 34.What does a toggle switch do? (a) works only while pressed (b) slides side to side (c) closes near a magnet (d) stays where you flip it
35. 35.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a trusted adult (c) nobody (d) a stranger online
36. 36.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
37. 37.🔋 5 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)? =
38. 38.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) fly kites in open fields (d) fly a kite near wires
39. 39.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a full circuit (d) a series circuit
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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes

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