Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 394 · 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 0.27 A?
2. 2.📏 Which unit measures power? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
3. 3.True or false: resistance is measured in ohms (Ω). (a) False (b) True
4. 4.📏 Which unit measures how much a part resists? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
5. 5.📏 How many milliamperes (mA) is 2.95 A?
6. 6.📏 How many ohms (Ω) is 1.3 kΩ?
7. 7.📏 How many amperes (A) is 2440 mA? =
8. 8.True or false: the ammeter measures current. (a) False (b) True
9. 9.Which of these is measured in volts (V)? (a) current (b) the push of a cell (c) resistance (d) energy used each second
10. 10.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 10 (c) 1000 (d) 100
11. 11.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
12. 12.True or false: voltage is measured in volts (V). (a) True (b) False
13. 13.True or false: the ammeter is joined in series. (a) False (b) True
14. 14.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1000 (c) 100 (d) 1024
15. 15.True or false: the ammeter is joined across a part. (a) False (b) True
16. 16.📏 How many watts (W) is 1.9 kW?
17. 17.📏 Which unit measures resistance? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
18. 18.True or false: power is measured in volts (V). (a) False (b) True
19. 19.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
20. 20.Which of these is measured in amperes (A)? (a) energy used each second (b) power (c) resistance (d) the flow of charge
21. 21.📏 How many kilo-ohms (kΩ) is 4700 Ω? =
22. 22.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) the water pressure (c) the flow of water (d) a narrow pipe
23. 23.True or false: the voltmeter measures voltage. (a) False (b) True
24. 24.True or false: the voltmeter is joined across a part. (a) False (b) True
25. 25.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
26. 26.Which of these is measured in watts (W)? (a) resistance (b) how much a part resists (c) power (d) the flow of charge
27. 27.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) a narrow pipe (c) the water pressure (d) the pipe colour
28. 28.📏 How many ohms (Ω) is 4.2 kΩ?
29. 29.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the water tank lid (c) the pipe colour (d) the tap handle
30. 30.📏 How many ohms (Ω) is 2.9 kΩ?
31. 31.📏 How many amperes (A) is 1290 mA? =
32. 32.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
33. 33.📏 How many milliamperes (mA) is 2.16 A?
34. 34.Which of these is measured in amperes (A)? (a) voltage (b) power (c) the push of a cell (d) current
35. 35.True or false: how much a part resists is measured in watts (W). (a) True (b) False
36. 36.📏 How many amperes (A) is 1720 mA? =
37. 37.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
38. 38.True or false: power is measured in watts (W). (a) False (b) True
39. 39.True or false: how much a part resists is measured in volts (V). (a) True (b) False
40. 40.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)

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