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physics gcse question
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jennaa21
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#1
this is the question:
The output of a mobile phone charger is labelled ‘5 V, 1 A, 5 W’. How much electrical energy will be supplied by the charger when it runs steadily for ten minutes?
i dont really understand
The output of a mobile phone charger is labelled ‘5 V, 1 A, 5 W’. How much electrical energy will be supplied by the charger when it runs steadily for ten minutes?
i dont really understand
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SpeedBird1004
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jennaa21
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SpeedBird1004
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jennaa21
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#5
(Original post by SpeedBird1004)
Define power?
Define power?
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SpeedBird1004
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#6
Okay. Can you define it using the formula. What you said is right. But in terms of a formula for Power, P = ?
(Original post by jennaa21)
rate of energy being transferred
rate of energy being transferred
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jennaa21
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#7
(Original post by SpeedBird1004)
Okay. Can you define it using the formula. What you said is right. But in terms of a formula for Power, P = ?
Okay. Can you define it using the formula. What you said is right. But in terms of a formula for Power, P = ?
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SpeedBird1004
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#8
(Original post by jennaa21)
energy transferred/time
energy transferred/time
Power = Energy transferred/ time
whats the power provided in the question?
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jennaa21
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#9
(Original post by SpeedBird1004)
Okay good.
Power = Energy transferred/ time
whats the power provided in the question?
Okay good.
Power = Energy transferred/ time
whats the power provided in the question?
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Ethanity007
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#10
Energy = power x time.
Make sure power is in watts and time in seconds for you to calculate the energy in Joules
Make sure power is in watts and time in seconds for you to calculate the energy in Joules
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SpeedBird1004
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#11
(Original post by jennaa21)
5?
5?
So 5 Watts = 5 Joules per second
whats the time duration in seconds?
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jennaa21
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#12
(Original post by Ethanity007)
Energy = power x time.
Make sure power is in watts and time in seconds for you to calculate the energy in Joules
Energy = power x time.
Make sure power is in watts and time in seconds for you to calculate the energy in Joules
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SpeedBird1004
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#13
(Original post by jennaa21)
ok so i got the answer 600 seconds x 5W = 3000J is that correct?
ok so i got the answer 600 seconds x 5W = 3000J is that correct?
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jennaa21
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#14
(Original post by SpeedBird1004)
Yes power is measured in Watts.
So 5 Watts = 5 Joules per second
whats the time duration in seconds?
Yes power is measured in Watts.
So 5 Watts = 5 Joules per second
whats the time duration in seconds?
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#15
(Original post by jennaa21)
ohhh so its 600 x 5 = 3000J
ohhh so its 600 x 5 = 3000J
so if you want to multiply power by time, time must be in seconds!
thats it.
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jennaa21
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SpeedBird1004
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