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How much power is produced if a voltage of #15 V# is applied to a circuit with a resistance of #5 Omega#?

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1 Answer

Grace · chandramohanPanakkal

May 19, 2016

Power is #45# #W#

Explanation:

#"Current in this circuit" = "voltage"/ "resistance"#
i.e. #I =V/R#

so #I= 15/5# = #3# #A#

Power= #"voltage" xx "current"# i.e. #P = V.I# = #15 xx 3# = #45 W#.
Or #I^2 xx R# = #3xx3 xx5# = #45# #W#.

where #V#=voltage # I#= current #R#= Resistance .

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