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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 0.1... 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.
Answer
To draw the circuit diagram:
- Start with the battery symbol, which is usually represented as a long and short parallel line (the long line is the positive terminal).
- Next, draw the lamp symbol, typically depicted as a circle with a filament symbol inside.
- Then, include the switch symbol, which consists of a break in a line with a small circle representing the pivot.
- Connect all these components in a series configuration, ensuring to follow the connections as depicted in Figure 1.
Step 2
(b) When the current in a lamp is 0.15 A, the resistance of the lamp is 40Ω. Calculate the voltage across the lamp.
Answer
To calculate the voltage across the lamp, use the formula:
Where:
- Voltage (V)
- Current (I) = 0.15 A
- Resistance (R) = 40 Ω
Substituting the values into the equation:
Thus, the voltage across the lamp is 6 V.
Step 3