Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 686 · 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 2760 mA? =
2. 2.📏 How many amperes (A) is 740 mA? =
3. 3.True or false: power is measured in watts (W). (a) True (b) False
4. 4.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water pressure (c) the water tank lid (d) the pipe colour
5. 5.📏 How many milliamperes (mA) is 2.79 A?
6. 6.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
7. 7.📏 How many ohms (Ω) is 1 kΩ?
8. 8.True or false: how much a part resists is measured in watts (W). (a) True (b) False
9. 9.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) the flow of water (c) the water pressure (d) a bigger tank
10. 10.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
11. 11.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 100 (c) 1000 (d) 10
12. 12.📏 How many kilo-ohms (kΩ) is 8800 Ω? =
13. 13.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
14. 14.Which of these is measured in volts (V)? (a) the flow of charge (b) current (c) how much a part resists (d) voltage
15. 15.True or false: the voltmeter measures voltage. (a) False (b) True
16. 16.Which of these is measured in watts (W)? (a) voltage (b) how much a part resists (c) the flow of charge (d) power
17. 17.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) resistance (c) current (d) power
18. 18.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
19. 19.📏 How many watts (W) is 1.3 kW?
20. 20.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
21. 21.True or false: the voltmeter measures current. (a) True (b) False
22. 22.Which of these is measured in amperes (A)? (a) energy used each second (b) power (c) current (d) the push of a cell
23. 23.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
24. 24.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
25. 25.📏 How many amperes (A) is 490 mA? =
26. 26.True or false: energy used each second is measured in watts (W). (a) True (b) False
27. 27.True or false: current is measured in amperes (A). (a) True (b) False
28. 28.📏 Which unit measures voltage? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
29. 29.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1000 (c) 100 (d) 1024
30. 30.📏 How many ohms (Ω) is 3.9 kΩ?
31. 31.True or false: the voltmeter is joined in series. (a) True (b) False
32. 32.📏 How many milliamperes (mA) is 1.8 A?
33. 33.📏 How many kilowatts (kW) is 4600 W? =
34. 34.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
35. 35.📏 How many ohms (Ω) is 8.5 kΩ?
36. 36.Which of these is measured in amperes (A)? (a) voltage (b) the flow of charge (c) resistance (d) the push of a cell
37. 37.Which of these is measured in volts (V)? (a) energy used each second (b) the push of a cell (c) the flow of charge (d) how much a part resists
38. 38.📏 How many milliamperes (mA) is 2.31 A?
39. 39.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
40. 40.📏 How many milliamperes (mA) is 1.75 A?

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