The most commonly used resistors have a power rating of 0.25w. What is the maximum current that can flow through when connected across a 5v supply?
Thanks for your help! :-)
Thanks for your help! :-)
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Hello again.
The equation for power P (in watts) in terms of current I (in amps) and voltage V (in volts) is, using the handy triangle:
-----------POWER-----------
VOLTAGE x CURRENT
The relevant equation for current is:
current = power/voltage
=> current = 0.25/5 = 0.05 Amps
Hope that makes sense.
The equation for power P (in watts) in terms of current I (in amps) and voltage V (in volts) is, using the handy triangle:
-----------POWER-----------
VOLTAGE x CURRENT
The relevant equation for current is:
current = power/voltage
=> current = 0.25/5 = 0.05 Amps
Hope that makes sense.
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Power = Voltage x Current
Therefore Current = Power / Voltage = 0.25 / 5 = 0.05 A
(In the previous answer 1.25 A is actually an unreasonably large current value).
Therefore Current = Power / Voltage = 0.25 / 5 = 0.05 A
(In the previous answer 1.25 A is actually an unreasonably large current value).
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is it 0.25 x 5 = 1.25
watts x voltage = current (if im wrong i failed my physics exam i sat recently) :P
watts x voltage = current (if im wrong i failed my physics exam i sat recently) :P