Figure 3 shows the parts in an electrical circuit - Edexcel - GCSE Physics - Question 2 - 2023 - Paper 2
Question 2
Figure 3 shows the parts in an electrical circuit.
The battery symbol and some of the connecting wires have been drawn for you.
(c) (i) There is a current of 0.46 ... show full transcript
Worked Solution & Example Answer:Figure 3 shows the parts in an electrical circuit - Edexcel - GCSE Physics - Question 2 - 2023 - Paper 2
Step 1
Calculate the total charge that flows through the lamp in 30 seconds.
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Answer
To find the total charge (Q) that flows through the lamp, we can use the formula:
Q=Iimest
where:
I is the current in amperes (A), and
t is the time in seconds (s).
Substituting in the values:
Current (I) = 0.46 A
Time (t) = 30 s
Calculating:
Q=0.46imes30=13.8extC
Thus, the total charge that flows through the lamp in 30 seconds is 13.8 C.
Step 2
Calculate the energy transferred to the lamp in one minute.
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Answer
To calculate the energy transferred (E) to the lamp, we use the formula:
E=IimesVimest
where:
I is the current in amperes (A),
V is the voltage in volts (V), and
t is the time in seconds (s).
Given:
Current (I) = 0.46 A
Voltage (V) = 6.0 V
Time (t) for one minute = 60 s
Substituting the values:
E=0.46imes6.0imes60
Calculating:
E=0.46imes6.0imes60=165.6extJ
Thus, the energy transferred to the lamp in one minute is approximately 170 J when rounded.