Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 596 · 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.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
2. 2.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) copper (d) rubber
3. 3.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
4. 4.True or false: a glass marble is a conductor. (a) True (b) False
5. 5.Which drawing is the symbol for a voltmeter? (a) a circle with a cross (b) a circle with V inside (c) two or more cell symbols (d) a dot where wires meet
6. 6.True or false: to throw cells in a fire is safe. (a) True (b) False
7. 7.True or false: a circle with an X in it is the symbol for a resistor. (a) True (b) False
8. 8.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
9. 9.Which of these means the circuit is closed? (a) the switch is ON (b) a wire is cut (c) the bulb is unscrewed (d) the switch is OFF
10. 10.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.🔦 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 cotton thread. Does the bulb glow? (a) Yes (b) No
12. 12.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
13. 13.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) own switch for each bulb
14. 14.🔦 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 cotton thread. Does the bulb glow? (a) Yes (b) No
15. 15.🔍 Which is the odd one out? (a) an exhaust fan (b) a ceiling fan (c) an electric drill (d) a loudspeaker
16. 16.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
17. 17.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
18. 18.🔍 Which is the odd one out? (a) use mains for a project (b) throw cells in a fire (c) take cells out after use (d) open a phone charger
19. 19.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
20. 20.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
21. 21.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
22. 22.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
23. 23.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
24. 24.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
25. 25.Which of these is not safe? (a) fly kites in open fields (b) keep drinks far away (c) stay away from pylons (d) poke things in a socket
26. 26.True or false: a circle with an X in it is the symbol for a battery. (a) False (b) True
27. 27.Which of these mainly gives out light? (a) a water heater (b) a toaster (c) an electric kettle (d) an LED lamp
28. 28.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the metal tip (d) the steel shaft
29. 29.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
30. 30.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.Which of these uses electricity? (a) a washing machine (b) a bicycle dynamo (c) a power station (d) a solar panel
32. 32.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
33. 33.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.⚠️ 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
35. 35.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
36. 36.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
37. 37.🔋 How many 2 V cells must be joined in series to give 16 V?
38. 38.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) an inverter socket (d) a mains extension board
39. 39.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
40. 40.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) cell (b) voltmeter (c) battery (d) resistor

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