The meter on the battery charger shows the current supplied to a battery - Edexcel - GCSE Physics Combined Science - Question 3 - 2020 - Paper 1
Question 3
The meter on the battery charger shows the current supplied to a battery.
The meter on the battery charger is
A
an ammeter
B
an ohmmeter
C
a voltmeter
D
a wattm... show full transcript
Worked Solution & Example Answer:The meter on the battery charger shows the current supplied to a battery - Edexcel - GCSE Physics Combined Science - Question 3 - 2020 - Paper 1
Step 1
The meter on the battery charger is
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Answer
The correct answer is A, an ammeter. An ammeter is used to measure the current flowing in a circuit, which is exactly what the meter on the battery charger does.
Step 2
Calculate the charge supplied to the battery in 5 minutes.
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Answer
To calculate the charge, we use the formula:
Q=Iimest
where:
Q is the charge in coulombs (C)
I is the current in amperes (A)
t is the time in seconds (s)
Given that the current I=2.5extA and the time t=5extminutes=5imes60exts=300exts,
we can substitute these values into the formula:
Q=2.5imes300=750extC
Thus, the charge supplied to the battery in 5 minutes is 750 coulombs.