GCSE Edexcel Physics Series & parallel circuits: 1 Figure 1 shows an electrical c

1 Figure 1 shows an electrical circuit - Edexcel - GCSE Physics - Question 1 - 2021 - Paper 1

Question 1

1 Figure 1 shows an electrical circuit. (a) Draw a circuit diagram of the electrical circuit in Figure 1 in the space below. (b) When the current in a lamp is 0.... show full transcript

Worked Solution & Example Answer:1 Figure 1 shows an electrical circuit - Edexcel - GCSE Physics - Question 1 - 2021 - Paper 1

Step 1

(a) Draw a circuit diagram of the electrical circuit in Figure 1 in the space below.

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Answer

To draw the circuit diagram:

Start by drawing the battery/cell symbol. This is typically a long line (positive terminal) and a short line (negative terminal).
Next, draw the lamp symbol which resembles a circle with a cross inside it.
Include the switch symbol, which is an open circle connected by two lines.
Finally, connect these components in series to represent the complete circuit as shown in Figure 1.

Step 2

(b) When the current in a lamp is 0.15 A, the resistance of the lamp is 40 Ω. Calculate the voltage across the lamp.

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Answer

To calculate the voltage across the lamp, use Ohm's Law, which is expressed as:

$V = I \times R$

Given:

Current, $I = 0.15$ A
Resistance, $R = 40$ Ω

Now substituting the values into the equation:

$V = 0.15 \times 40 = 6 \, \text{V}$

Thus, the voltage across the lamp is $6 \, \text{V}$ .

Step 3

(c) Figure 2 shows an ammeter that can read up to 5 A. State the value of the current shown on the ammeter in Figure 2.

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Answer

An examination of Figure 2 shows that the current indicated on the ammeter is 2 A. This value is evident from the position of the needle on the scale.

1 Figure 1 shows an electrical circuit - Edexcel - GCSE Physics - Question 1 - 2021 - Paper 1

Worked Solution & Example Answer:1 Figure 1 shows an electrical circuit - Edexcel - GCSE Physics - Question 1 - 2021 - Paper 1

(a) Draw a circuit diagram of the electrical circuit in Figure 1 in the space below.

(b) When the current in a lamp is 0.15 A, the resistance of the lamp is 40 Ω. Calculate the voltage across the lamp.

(c) Figure 2 shows an ammeter that can read up to 5 A. State the value of the current shown on the ammeter in Figure 2.

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