Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 780 · 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 milliamperes (mA) is 0.96 A?
2. 2.📏 How many kilo-ohms (kΩ) is 9700 Ω? =
3. 3.📏 Which unit measures energy used each second? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
4. 4.📏 Which unit measures power? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
5. 5.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 60 (c) 1000 (d) 10
6. 6.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1024 (c) 1000 (d) 100
7. 7.📏 Which unit measures resistance? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
8. 8.📏 How many milliamperes (mA) is 0.21 A?
9. 9.📏 How many watts (W) is 4.1 kW?
10. 10.Which of these is measured in ohms (Ω)? (a) power (b) the push of a cell (c) resistance (d) energy used each second
11. 11.📏 How many watts (W) is 2.8 kW?
12. 12.📏 Which unit measures the push of a cell? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
13. 13.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the pipe colour (c) the water pressure (d) the tap handle
14. 14.📏 How many watts (W) is 0.4 kW?
15. 15.True or false: the voltmeter is joined across a part. (a) False (b) True
16. 16.True or false: the voltmeter measures voltage. (a) True (b) False
17. 17.📏 How many kilowatts (kW) is 3950 W? =
18. 18.Which of these is measured in ohms (Ω)? (a) power (b) voltage (c) how much a part resists (d) energy used each second
19. 19.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
20. 20.True or false: voltage is measured in amperes (A). (a) False (b) True
21. 21.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the water pressure (c) the pipe colour (d) the flow of water
22. 22.📏 How many amperes (A) is 2420 mA? =
23. 23.True or false: power is measured in watts (W). (a) False (b) True
24. 24.Which of these is measured in volts (V)? (a) how much a part resists (b) current (c) resistance (d) voltage
25. 25.Which of these is measured in watts (W)? (a) how much a part resists (b) resistance (c) energy used each second (d) current
26. 26.True or false: the ammeter is joined across a part. (a) False (b) True
27. 27.Which of these is measured in amperes (A)? (a) energy used each second (b) voltage (c) current (d) the push of a cell
28. 28.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
29. 29.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
30. 30.📏 How many milliamperes (mA) is 2.12 A?
31. 31.True or false: the ammeter is joined in series. (a) True (b) False
32. 32.True or false: the voltmeter measures current. (a) True (b) False
33. 33.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
34. 34.📏 How many amperes (A) is 1820 mA? =
35. 35.True or false: voltage is measured in volts (V). (a) False (b) True
36. 36.True or false: the voltmeter is joined in series. (a) False (b) True
37. 37.True or false: the ammeter measures voltage. (a) False (b) True
38. 38.📏 Which unit measures voltage? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
39. 39.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
40. 40.True or false: energy used each second is measured in amperes (A). (a) False (b) True

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