Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 314 · 40 questions

Remember (Push, flow, resist): Voltage → volts (V), current → amperes (A), resistance → ohms (Ω), power → watts (W). milli (m) = ÷ 1000 and kilo (k) = × 1000: 250 mA = 0.25 A, 2.2 kΩ = 2200 Ω. Voltmeter across a part; ammeter in series.

1. 1.📏 How many amperes (A) is 810 mA? =
2. 2.📏 Which unit measures current? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
3. 3.📏 Which unit measures energy used each second? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
4. 4.True or false: voltage is measured in watts (W). (a) False (b) True
5. 5.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
6. 6.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
7. 7.True or false: the ammeter is joined in series. (a) True (b) False
8. 8.True or false: current is measured in volts (V). (a) True (b) False
9. 9.📏 Which unit measures the flow of charge? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
10. 10.📏 How many watts (W) is 4.6 kW?
11. 11.📏 Which unit measures voltage? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
12. 12.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
13. 13.True or false: resistance is measured in ohms (Ω). (a) False (b) True
14. 14.Which of these is measured in amperes (A)? (a) current (b) energy used each second (c) voltage (d) resistance
15. 15.📏 Which unit measures resistance? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
16. 16.Which of these is measured in amperes (A)? (a) how much a part resists (b) energy used each second (c) the flow of charge (d) the push of a cell
17. 17.True or false: the voltmeter measures voltage. (a) True (b) False
18. 18.📏 Which unit measures power? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
19. 19.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the tap handle (c) the water pressure (d) the pipe colour
20. 20.True or false: power is measured in amperes (A). (a) True (b) False
21. 21.📏 How many kilowatts (kW) is 950 W? =
22. 22.True or false: voltage is measured in ohms (Ω). (a) True (b) False
23. 23.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the water pressure (c) a narrow pipe (d) the pipe colour
24. 24.📏 How many kilo-ohms (kΩ) is 100 Ω? =
25. 25.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) resistance (c) the push of a cell (d) current
26. 26.📏 Which unit measures the push of a cell? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
27. 27.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 1000 (c) 60 (d) 100
28. 28.📏 How many amperes (A) is 610 mA? =
29. 29.📏 How many kilo-ohms (kΩ) is 600 Ω? =
30. 30.📏 How many milliamperes (mA) is 0.31 A?
31. 31.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a narrow pipe (d) a bigger tank
32. 32.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
33. 33.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
34. 34.True or false: the ammeter measures current. (a) True (b) False
35. 35.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
36. 36.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
37. 37.True or false: the voltmeter measures current. (a) False (b) True
38. 38.📏 How many watts (W) is 0.4 kW?
39. 39.True or false: the ammeter measures voltage. (a) False (b) True
40. 40.Which of these is measured in volts (V)? (a) power (b) current (c) how much a part resists (d) voltage

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