A technician investigates the potential difference (voltage) across an electrical heater. This circuit diagram shows the circuit the technician uses. This circuit diagram shows the circuit the technician uses. (i) Add a voltmeter to the circuit which will measure the potential difference (voltage) across the heater. (ii) The resistance of the heater is 15 Ω. The current in the heater is 0.56 A. Calculate the potential difference (voltage) across the heater.

Photo AI

A technician investigates the potential difference (voltage) across an electrical heater - Edexcel - GCSE Physics - Question 4 - 2015 - Paper 1

Question 4

A technician investigates the potential difference (voltage) across an electrical heater. This circuit diagram shows the circuit the technician uses. This circuit ... show full transcript

Worked Solution & Example Answer:A technician investigates the potential difference (voltage) across an electrical heater - Edexcel - GCSE Physics - Question 4 - 2015 - Paper 1

Step 1

Add a voltmeter to the circuit which will measure the potential difference (voltage) across the heater.

96%

114 rated

Answer

To add a voltmeter, place the voltmeter in parallel with the heater in the circuit diagram. The voltmeter symbol is a circle with a 'V' inside or an equivalent approximation.

Step 2

Calculate the potential difference (voltage) across the heater.

99%

104 rated

Answer

Using Ohm's law, the voltage (V) across the heater can be calculated using the formula:

$V = I \times R$

Where:

$I = 0.56 \text{ A}$
$R = 15 \text{ Ω}$

Substituting the values: $V = 0.56 \text{ A} \times 15 \text{ Ω} = 8.4 \text{ V}$

Thus, the potential difference (voltage) across the heater is 8.4 V.

Join the GCSE students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

;