What is the power of 4ohm resistor connected to a 12v battery?

36watts

Explanation:

Data obtained from the question include:

R (Resistor) = 4 Ohms

V (Voltage) = 12V

P (power) =?

P = IV

Recall: I = V/R

P = V^2 /R

P = (12)^2 /4

P = 144/4

P = 36watts

Therefore, power is 36watts

= 36 watts

Explanation:

Power = I V

From ohms law

V = I R

divide both sides by R

V/R = I

I = V/R

therefore if,  P = IV, put I = V/R into it

P= V/R × V

P = V² / R

Given,  V = 12v

R = 4 ohms

Therefore

P= 12² / 4

P = 144/4

P = 36 watts

Power = 36 watts

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