Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 339 · 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 2840 mA? =
2. 2.📏 How many ohms (Ω) is 7.9 kΩ?
3. 3.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
4. 4.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
5. 5.True or false: resistance is measured in ohms (Ω). (a) False (b) True
6. 6.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
7. 7.📏 Which unit measures the push of a cell? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
8. 8.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the flow of water (c) the water pressure (d) the pipe colour
9. 9.True or false: the voltmeter measures voltage. (a) False (b) True
10. 10.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the tap handle (c) the water tank lid (d) the pipe colour
11. 11.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1000 (c) 10 (d) 1024
12. 12.📏 How many watts (W) is 2.5 kW?
13. 13.Which of these is measured in volts (V)? (a) how much a part resists (b) voltage (c) power (d) the flow of charge
14. 14.True or false: the ammeter is joined in series. (a) True (b) False
15. 15.True or false: the ammeter measures voltage. (a) False (b) True
16. 16.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
17. 17.📏 Which unit measures current? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
18. 18.True or false: how much a part resists is measured in amperes (A). (a) False (b) True
19. 19.True or false: voltage is measured in volts (V). (a) True (b) False
20. 20.📏 How many watts (W) is 4.2 kW?
21. 21.📏 How many kilo-ohms (kΩ) is 2800 Ω? =
22. 22.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) the water pressure (d) a narrow pipe
23. 23.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
24. 24.True or false: energy used each second is measured in amperes (A). (a) True (b) False
25. 25.True or false: the voltmeter measures current. (a) False (b) True
26. 26.True or false: current is measured in amperes (A). (a) True (b) False
27. 27.True or false: the voltmeter is joined in series. (a) False (b) True
28. 28.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 100 (c) 10 (d) 1000
29. 29.📏 How many kilo-ohms (kΩ) is 400 Ω? =
30. 30.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
31. 31.True or false: energy used each second is measured in watts (W). (a) True (b) False
32. 32.True or false: the ammeter is joined across a part. (a) True (b) False
33. 33.📏 Which unit measures resistance? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
34. 34.📏 How many amperes (A) is 390 mA? =
35. 35.Which of these is measured in ohms (Ω)? (a) voltage (b) current (c) the push of a cell (d) resistance
36. 36.Which of these is measured in watts (W)? (a) current (b) voltage (c) power (d) how much a part resists
37. 37.📏 Which unit measures power? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
38. 38.📏 How many ohms (Ω) is 1 kΩ?
39. 39.Which of these is measured in amperes (A)? (a) how much a part resists (b) current (c) the push of a cell (d) voltage
40. 40.📏 How many ohms (Ω) is 1.6 kΩ?

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