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 0.15... show full transcript
Worked Solution & Example Answer:Figure 1 shows an electrical circuit - Edexcel - GCSE Physics Combined Science - Question 1 - 2021 - Paper 1
Step 1
Draw a circuit diagram of the electrical circuit in Figure 1 in the space below.
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Answer
The circuit diagram should include the following symbols:
A battery or cell symbol (for the 9V battery).
A lamp symbol representing the electrical lamp.
A switch symbol.
The circuit diagram will illustrate a complete series circuit connecting these components.
Step 2
Calculate the voltage across the lamp.
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Answer
To find the voltage across the lamp, we use the formula:
V=I×R
Given:
Current (I) = 0.15 A
Resistance (R) = 40 Ω
Now substitute the values into the equation:
V=0.15imes40=6extV
Thus, the voltage across the lamp is 6 V.
Step 3
State the value of the current shown on the ammeter in Figure 2.
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Answer
The current shown on the ammeter in Figure 2 is 2 A.
