The voltage (potential difference) across a length of wire is 1.5V. A charge of 0.042 C flows through the wire. Calculate the energy transferred. Use the equation E = Q × V Add connecting wires, a voltmeter and an ammeter to complete the circuit in Figure 20 so that the students can determine the resistance of the piece of iron wire. Draw a straight line of best fit on Figure 21. Use Figure 21 to estimate the resistance of a 100 cm length of the iron wire. The potential difference (voltage) across another piece of wire is 1.56V. Calculate the resistance of this piece of wire. Use the equation V = I × R

GCSE Edexcel Physics Potential difference & resistance: The voltage (potential differenc

The voltage (potential difference) across a length of wire is 1.5V - Edexcel - GCSE Physics - Question 8 - 2023 - Paper 2

Question 8

The voltage (potential difference) across a length of wire is 1.5V. A charge of 0.042 C flows through the wire. Calculate the energy transferred. Use the equation... show full transcript

Worked Solution & Example Answer:The voltage (potential difference) across a length of wire is 1.5V - Edexcel - GCSE Physics - Question 8 - 2023 - Paper 2

Step 1

Calculate the energy transferred.

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Answer

To calculate the energy transferred, use the formula:

$E = Q imes V$

Substituting the values:

$E = 0.042 ext{ C} imes 1.5 ext{ V}$

This results in:

$E = 0.063 ext{ J}$

Step 2

Add connecting wires, a voltmeter and an ammeter.

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Answer

The voltmeter should be connected in parallel with the iron wire, and the ammeter should be connected in series with the iron wire.

Step 3

Draw a straight line of best fit on Figure 21.

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Answer

Using the graph provided in Figure 21, draw a straight line that best represents the data points, ensuring that it has equal points of intersection above and below the line.

Step 4

Use Figure 21 to estimate the resistance of a 100 cm length of the iron wire.

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Answer

Reference the straight line of best fit to find the resistance corresponding to 100 cm from the graph.

Step 5

Calculate the resistance of this piece of wire.

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Answer

Using the formula $V = I imes R$ rearranged to find resistance: $R = \frac{V}{I}$ Substituting the known values: $R = \frac{1.56 ext{ V}}{0.45 ext{ A}} = 3.47 ext{ Ω}$

The voltage (potential difference) across a length of wire is 1.5V - Edexcel - GCSE Physics - Question 8 - 2023 - Paper 2

Worked Solution & Example Answer:The voltage (potential difference) across a length of wire is 1.5V - Edexcel - GCSE Physics - Question 8 - 2023 - Paper 2

Calculate the energy transferred.

Add connecting wires, a voltmeter and an ammeter.

Draw a straight line of best fit on Figure 21.

Use Figure 21 to estimate the resistance of a 100 cm length of the iron wire.

Calculate the resistance of this piece of wire.

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