Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 250 · 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.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
2. 2.📏 Which unit measures how much a part resists? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
3. 3.Which of these is measured in volts (V)? (a) power (b) voltage (c) how much a part resists (d) current
4. 4.📏 How many amperes (A) is 1400 mA? =
5. 5.📏 How many kilo-ohms (kΩ) is 7800 Ω? =
6. 6.📏 How many kilo-ohms (kΩ) is 1900 Ω? =
7. 7.True or false: resistance is measured in ohms (Ω). (a) True (b) False
8. 8.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a narrow pipe (d) a bigger tank
9. 9.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
10. 10.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
11. 11.📏 Which unit measures resistance? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
12. 12.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
13. 13.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
14. 14.True or false: power is measured in volts (V). (a) True (b) False
15. 15.True or false: the ammeter measures current. (a) True (b) False
16. 16.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 1000 (c) 100 (d) 10
17. 17.True or false: the ammeter is joined across a part. (a) True (b) False
18. 18.📏 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
19. 19.📏 How many watts (W) is 2.2 kW?
20. 20.📏 Which unit measures power? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
21. 21.True or false: current is measured in amperes (A). (a) False (b) True
22. 22.Which of these is measured in ohms (Ω)? (a) energy used each second (b) power (c) resistance (d) voltage
23. 23.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1024 (c) 1000 (d) 10
24. 24.Which of these is measured in watts (W)? (a) current (b) energy used each second (c) how much a part resists (d) resistance
25. 25.True or false: the ammeter measures voltage. (a) True (b) False
26. 26.Which of these is measured in amperes (A)? (a) the flow of charge (b) resistance (c) power (d) voltage
27. 27.📏 How many watts (W) is 1 kW?
28. 28.📏 How many ohms (Ω) is 1.5 kΩ?
29. 29.📏 Which unit measures current? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
30. 30.📏 How many kilo-ohms (kΩ) is 2300 Ω? =
31. 31.📏 How many amperes (A) is 2530 mA? =
32. 32.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
33. 33.📏 Which unit measures energy used each second? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
34. 34.📏 How many milliamperes (mA) is 0.98 A?
35. 35.📏 How many milliamperes (mA) is 0.21 A?
36. 36.📏 How many milliamperes (mA) is 0.06 A?
37. 37.📏 How many amperes (A) is 2620 mA? =
38. 38.📏 How many watts (W) is 1.1 kW?
39. 39.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the pipe colour (c) the tap handle (d) the water tank lid
40. 40.📏 How many milliamperes (mA) is 2.76 A?

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