How much power is produced if a voltage of #2 V# is applied to a circuit with a resistance of #40 Omega#?

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Answer 1 · 2018-07-02T21:55:35

#0.1# Watts

Power #(P)# produced in a circuit of resistance #R=40 \Omega# when a voltage #V=2 V# is applied is

#P=VI=V(V/R)=\frac{V^2}{R}#

#=\frac{2^2}{40}#

#=0.1 \ W#

Answer 2 · 2018-07-03T04:34:34

#0.1# watts.

Power here is given by the equation:

#P=V^2/R#

where:

#P# is the power produced in watts

#V# is the voltage in volts

#R# is the resistance in ohms

So, we get:

#P=(2 \ "V")^2/(40 \ Omega)#

#=(4 \ "V"^2)/(40 \ Omega)#

#=0.1 \ "W"#