4.5 Electromagnetic effects

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

Question 51

State the name of each of the three wires inside a standard mains electricity power cable.

$…\dots$
$…\dots$
$…\dots$

[1]

The power cable of an appliance is designed for a maximum current of $A10\text{ A}$ . Suggest one hazard that could occur if a current of $A25\text{ A}$ flows through this cable.

[1]

There is a step-down transformer inside the appliance.

The input voltage to the primary coil $VpV_{\text{p}}$ [_]is $V240\text{ V}$ (a.c.).
The number of turns on the primary coil $NpN_{\text{p}}$ [_]is $800$ .
The number of turns on the secondary coil $NsN_{\text{s}}$ [_]is $50$ .

Calculate the output voltage $VsV_{\text{s}}$ [_]of the secondary coil.

[2]

The current in the input (primary) coil of the transformer is $A1.8\text{ A}$ . Calculate the electrical input power to the appliance.

[2]

4.5 Electromagnetic effects

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

Question 51

State the name of each of the three wires inside a standard mains electricity power cable.

$…\dots$
$…\dots$
$…\dots$

[1]

The power cable of an appliance is designed for a maximum current of $A10\text{ A}$ . Suggest one hazard that could occur if a current of $A25\text{ A}$ flows through this cable.

[1]

There is a step-down transformer inside the appliance.

The input voltage to the primary coil $VpV_{\text{p}}$ [_]is $V240\text{ V}$ (a.c.).
The number of turns on the primary coil $NpN_{\text{p}}$ [_]is $800$ .
The number of turns on the secondary coil $NsN_{\text{s}}$ [_]is $50$ .

Calculate the output voltage $VsV_{\text{s}}$ [_]of the secondary coil.

[2]

The current in the input (primary) coil of the transformer is $A1.8\text{ A}$ . Calculate the electrical input power to the appliance.

[2]

4.5 Electromagnetic effects

Question 51

Markscheme

4.5 Electromagnetic effects

Question 51

Markscheme

4.5 Electromagnetic effects

Question 51

4.5 Electromagnetic effects Questions

4.5 Electromagnetic effects

Question 51

4.5 Electromagnetic effects Questions