Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 918 · 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, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
2. 2.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
3. 3.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
4. 4.Which of these is not safe? (a) stop if a part gets hot (b) fly kites in open fields (c) touch a fallen wire (d) use small battery cells
5. 5.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
6. 6.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
8. 8.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) resistor (b) motor (c) battery (d) switch
9. 9.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) never (d) when both are ON
10. 10.Which drawing is the symbol for a motor? (a) a line lifted at a gap (b) triangle against a bar (c) a circle with M inside (d) a straight line
11. 11.True or false: to build with an adult near is not safe. (a) False (b) True
12. 12.Which of these is not safe? (a) take cells out after use (b) use small battery cells (c) poke things in a socket (d) fly kites in open fields
13. 13.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the bare end (c) the metal tip (d) the plastic handle
14. 14.Which of these is an insulator? (a) a graphite rod (b) aluminium foil (c) a plastic ruler (d) a steel spoon
15. 15.🔍 Which is the odd one out? (a) stop if a part gets hot (b) stay away from pylons (c) open a phone charger (d) fly kites in open fields
16. 16.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
17. 17.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.🔍 Which is the odd one out? (a) a safety pin (b) a metal paper clip (c) aluminium foil (d) a rubber eraser
20. 20.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
21. 21.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) only one (d) none
22. 22.True or false: a straight line is the symbol for an ammeter. (a) True (b) False
23. 23.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
24. 24.Which of these mainly makes movement? (a) a buzzer (b) a tube light (c) a mixer grinder (d) an electric kettle
25. 25.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) an open circuit (c) a series circuit (d) a closed circuit
26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
27. 27.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
28. 28.Which of these means the circuit is open? (a) the bulb is unscrewed (b) the loop is complete (c) the switch is ON (d) all wires are joined
29. 29.🔍 Which is the odd one out? (a) a dry cork (b) a plastic straw (c) a plastic ruler (d) a graphite rod
30. 30.🔋 How many 1.5 V cells must be joined in series to give 9 V?
31. 31.🔍 Which is the odd one out? (a) a doorbell (b) a mixer grinder (c) a ceiling fan (d) a table fan
32. 32.True or false: to fly kites in open fields is not safe. (a) True (b) False
33. 33.🔋 How many 3 V cells must be joined in series to give 21 V?
34. 34.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) the loop is complete (d) the switch is OFF
35. 35.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) bulbs share the voltage (d) one out, the rest glow
36. 36.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
37. 37.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
38. 38.Which of these is safe? (a) build with an adult near (b) fly a kite near wires (c) use mains for a project (d) throw cells in a fire
39. 39.True or false: to poke things in a socket is safe. (a) True (b) False
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes

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