Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 18 · 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 milliamperes (mA) make 1 ampere? (a) 10 (b) 1000 (c) 60 (d) 100
2. 2.True or false: the ammeter measures voltage. (a) True (b) False
3. 3.True or false: current is measured in amperes (A). (a) True (b) False
4. 4.📏 How many watts (W) is 3.2 kW?
5. 5.True or false: the push of a cell is measured in volts (V). (a) False (b) True
6. 6.True or false: voltage is measured in volts (V). (a) True (b) False
7. 7.📏 How many kilo-ohms (kΩ) is 7300 Ω? =
8. 8.Which of these is measured in ohms (Ω)? (a) current (b) voltage (c) resistance (d) the push of a cell
9. 9.True or false: the voltmeter measures voltage. (a) True (b) False
10. 10.True or false: the ammeter is joined in series. (a) False (b) True
11. 11.📏 Which unit measures power? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
12. 12.Which of these is measured in amperes (A)? (a) resistance (b) the push of a cell (c) voltage (d) the flow of charge
13. 13.📏 Which unit measures current? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
14. 14.📏 Which unit measures how much a part resists? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
15. 15.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
16. 16.Which of these is measured in watts (W)? (a) the push of a cell (b) resistance (c) energy used each second (d) current
17. 17.📏 Which unit measures the push of a cell? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
18. 18.Which of these is measured in volts (V)? (a) energy used each second (b) power (c) resistance (d) voltage
19. 19.True or false: energy used each second is measured in watts (W). (a) True (b) False
20. 20.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
21. 21.📏 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
22. 22.True or false: the flow of charge is measured in watts (W). (a) True (b) False
23. 23.Which of these is measured in ohms (Ω)? (a) power (b) voltage (c) how much a part resists (d) the flow of charge
24. 24.📏 How many ohms (Ω) is 3 kΩ?
25. 25.📏 Which unit measures energy used each second? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
26. 26.Which of these is measured in amperes (A)? (a) power (b) the push of a cell (c) current (d) voltage
27. 27.📏 How many milliamperes (mA) is 0.32 A?
28. 28.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) the water pressure (c) a narrow pipe (d) a bigger tank
29. 29.True or false: the push of a cell is measured in ohms (Ω). (a) True (b) False
30. 30.True or false: power is measured in ohms (Ω). (a) True (b) False
31. 31.📏 Which unit measures the flow of charge? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
32. 32.📏 How many kilowatts (kW) is 4750 W? =
33. 33.📏 How many kilowatts (kW) is 2400 W? =
34. 34.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 10 (d) 100
35. 35.📏 How many watts (W) is 0.5 kW?
36. 36.📏 How many milliamperes (mA) is 0.24 A?
37. 37.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
38. 38.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
39. 39.📏 How many milliamperes (mA) is 2.79 A?
40. 40.📏 Which unit measures voltage? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)

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