Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 889 · 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 ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 100 (c) 1024 (d) 1000
2. 2.📏 Which unit measures how much a part resists? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
3. 3.True or false: the push of a cell is measured in amperes (A). (a) False (b) True
4. 4.📏 How many kilowatts (kW) is 3950 W? =
5. 5.True or false: the push of a cell is measured in ohms (Ω). (a) True (b) False
6. 6.📏 Which unit measures current? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
7. 7.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
8. 8.📏 How many watts (W) is 3.5 kW?
9. 9.📏 Which unit measures the flow of charge? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
10. 10.True or false: the ammeter measures current. (a) False (b) True
11. 11.True or false: voltage is measured in volts (V). (a) False (b) True
12. 12.True or false: the ammeter is joined in series. (a) True (b) False
13. 13.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
14. 14.True or false: power is measured in watts (W). (a) False (b) True
15. 15.Which of these is measured in amperes (A)? (a) current (b) power (c) how much a part resists (d) the push of a cell
16. 16.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the water pressure (c) the flow of water (d) the pipe colour
17. 17.📏 How many milliamperes (mA) is 1.27 A?
18. 18.Which of these is measured in amperes (A)? (a) the push of a cell (b) power (c) the flow of charge (d) resistance
19. 19.📏 How many kilo-ohms (kΩ) is 4400 Ω? =
20. 20.Which of these is measured in volts (V)? (a) how much a part resists (b) the flow of charge (c) energy used each second (d) the push of a cell
21. 21.📏 How many watts (W) is 1.5 kW?
22. 22.📏 How many milliamperes (mA) is 0.99 A?
23. 23.📏 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
24. 24.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
25. 25.True or false: the ammeter is joined across a part. (a) False (b) True
26. 26.Which of these is measured in volts (V)? (a) energy used each second (b) voltage (c) the flow of charge (d) resistance
27. 27.📏 How many amperes (A) is 1710 mA? =
28. 28.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 10 (c) 60 (d) 1000
29. 29.📏 How many kilo-ohms (kΩ) is 1900 Ω? =
30. 30.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
31. 31.📏 How many milliamperes (mA) is 1.23 A?
32. 32.📏 Which unit measures voltage? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
33. 33.📏 How many milliamperes (mA) is 2.77 A?
34. 34.📏 How many amperes (A) is 2140 mA? =
35. 35.📏 How many milliamperes (mA) is 0.53 A?
36. 36.True or false: the voltmeter measures voltage. (a) False (b) True
37. 37.Which of these is measured in watts (W)? (a) resistance (b) the push of a cell (c) energy used each second (d) voltage
38. 38.📏 How many watts (W) is 4.5 kW?
39. 39.True or false: the ammeter measures voltage. (a) False (b) True
40. 40.Which of these is measured in ohms (Ω)? (a) voltage (b) energy used each second (c) power (d) how much a part resists

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