How much power is produced if a voltage of #6 V# is applied to a circuit with a resistance of #42 Omega#?

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Answer 1 · 2018-06-22T14:19:41

Find the current by #I=E/R =6/42=0.1428" amperes." #

#"Power= voltage "xx" current " 6 xx 0.1428= 0.88571" watts."#

Answer 2 · 2018-06-23T04:23:06

Approximately #0.86# watts.

Power is related through voltage and resistance by the equation:

#P=V^2/R#

where:

#P# is the power in watts

#V# is the voltage in volts

#R# is the resistance in ohms

So, we get:

#P=(6 \ "V")^2/(42 \ Omega)#

#=(36 \ "V"^2)/(42 \ Omega)#

#~~0.86 \ "W"#