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. (4)
(b) When the current in a lamp is... show full transcript
Worked Solution & Example Answer:1. Figure 1 shows an electrical circuit - Edexcel - GCSE Physics - 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 can be represented as follows:
Draw a symbol for the battery (or cell).
Draw a lamp symbol connected in series after the battery.
Include a switch symbol in line with the lamp.
The completed circuit diagram should look something like this:
+-------[
| |
(battery) (switch)
| |
+--[Lamp]--+
Note: Ensure that the symbols used are appropriately labeled as per standard circuit conventions.
Step 2
Calculate the voltage across the lamp.
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Answer
To find the voltage across the lamp, we will use the formula:
V=I×R
Where:
I=0.15 A (current in the lamp)
R=40Ω (resistance of the lamp)
Plugging in the values:
V=0.15×40=6 V
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
By observing the ammeter in Figure 2, the current reading is at the mark '2'. Therefore, the value of the current shown on the ammeter is:
