For R = 200 ohms and I = 0.02 amps, what is the value of P (power)?

To find the power (P) in an electrical circuit, you can use the formula based on Ohm's Law, which states that power is the product of current and voltage. However, there is also a more direct formula that involves resistance and current:

[ P = I^2 \times R ]

Where:

• ( P ) is the power in watts,

• ( I ) is the current in amps,

• ( R ) is the resistance in ohms.

Given the values:

• ( R = 200 ) ohms,

• ( I = 0.02 ) amps,

we substitute these into the formula:

[ P = (0.02)^2 \times 200 ]

Calculating ( (0.02)^2 ):

[ (0.02)^2 = 0.0004 ]

Now multiply this by the resistance:

[ P = 0.0004 \times 200 = 0.08 \text{ watts} ]

Therefore, the calculated power is 0.08 watts, making it the correct answer. This method provides a straightforward calculation of power based on the known values of current and resistance.