A 30 ohm resistor is connected to a 1.5 V battery. How much power is dissipated by the resistor?
I'm confused of the formula to use here.
Does P=V^2/R seem correct?
Yep. The answer would be 0.075
To calculate the power dissipated by a resistor, you can use the formula:
Power (P) = (Voltage)^2 / Resistance
In this case, the given voltage is 1.5 V, and the resistance of the resistor is 30 ohms.
Plugging these values into the formula, we get:
P = (1.5 V)^2 / 30 ohms
Simplifying the equation further:
P = 2.25 V^2 / 30 ohms
P = 0.075 W
Therefore, the power dissipated by the resistor is 0.075 watts.