Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 834 · 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.📏 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
2. 2.True or false: current is measured in amperes (A). (a) True (b) False
3. 3.Which of these is measured in amperes (A)? (a) the flow of charge (b) how much a part resists (c) power (d) resistance
4. 4.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
5. 5.📏 Which unit measures power? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
6. 6.True or false: how much a part resists is measured in volts (V). (a) False (b) True
7. 7.True or false: the voltmeter is joined in series. (a) False (b) True
8. 8.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
9. 9.📏 Which unit measures resistance? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
10. 10.Which of these is measured in watts (W)? (a) voltage (b) how much a part resists (c) power (d) current
11. 11.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
12. 12.📏 How many amperes (A) is 1810 mA? =
13. 13.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 1000 (c) 100 (d) 10
14. 14.True or false: voltage is measured in volts (V). (a) False (b) True
15. 15.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
16. 16.Which of these is measured in amperes (A)? (a) current (b) resistance (c) energy used each second (d) power
17. 17.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
18. 18.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
19. 19.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 60 (c) 1000 (d) 100
20. 20.📏 Which unit measures voltage? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
21. 21.📏 How many watts (W) is 3 kW?
22. 22.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
23. 23.True or false: power is measured in watts (W). (a) False (b) True
24. 24.Which of these is measured in volts (V)? (a) power (b) current (c) the push of a cell (d) resistance
25. 25.📏 How many kilo-ohms (kΩ) is 1600 Ω? =
26. 26.📏 How many watts (W) is 0.1 kW?
27. 27.True or false: the push of a cell is measured in volts (V). (a) False (b) True
28. 28.True or false: the voltmeter measures voltage. (a) False (b) True
29. 29.True or false: the voltmeter measures current. (a) True (b) False
30. 30.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) a bigger tank (c) the flow of water (d) the water pressure
31. 31.Which of these is measured in volts (V)? (a) power (b) voltage (c) resistance (d) how much a part resists
32. 32.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the pipe colour (c) the water tank lid (d) the tap handle
33. 33.📏 How many milliamperes (mA) is 3 A?
34. 34.True or false: how much a part resists is measured in watts (W). (a) True (b) False
35. 35.Which of these is measured in ohms (Ω)? (a) current (b) how much a part resists (c) the flow of charge (d) energy used each second
36. 36.📏 How many kilowatts (kW) is 50 W? =
37. 37.📏 How many milliamperes (mA) is 0.42 A?
38. 38.📏 Which unit measures the push of a cell? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
39. 39.📏 How many kilowatts (kW) is 2750 W? =
40. 40.📏 How many watts (W) is 2.5 kW?

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