4.5 Electromagnetic effects

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Question 6

In an experiment, a student uses an electrical heater connected to a power supply.

The current in the electrical heater is $A1.8\text{ A}$ . The voltage (p.d.) across the heater is $V20\text{ V}$ .

Calculate the energy transferred to the heater in $s150\text{ s}$ .

energy transferred = $J\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\text{ J}$

[3]

The power supply is connected to the electrical mains by a cable that consists of three wires.

State the name for each of the three wires in the cable.

$……………………………………\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots$
$……………………………………\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots$
$……………………………………\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots$

[3]

The power supply includes a transformer.

The voltage ( $VpV_{\text{p}}$ ) across the primary coil of the transformer is $V230\text{ V}$ . The voltage ( $VsV_{\text{s}}$ ) across the secondary coil of the transformer is $V20\text{ V}$ . The number of turns on the primary coil ( $NpN_{\text{p}}$ ) is $1150$ .

Calculate the number of turns ( $NsN_{\text{s}}$ ) on the secondary coil.

number of turns on secondary coil = $…………………………………………\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots$

[3]

4.5 Electromagnetic effects

Question 6

Markscheme

4.5 Electromagnetic effects

Question 6

Markscheme

4.5 Electromagnetic effects

Question 6

4.5 Electromagnetic effects Questions

4.5 Electromagnetic effects

Question 6

4.5 Electromagnetic effects Questions