A DC device taking 1 milliampere at 1 KV takes a total power of what?

To determine the power consumed by a DC device, you can use the formula for power, which is given by the product of voltage and current:

[ \text{Power (P)} = \text{Voltage (V)} \times \text{Current (I)} ]

In this case, the voltage is 1 kilovolt (KV), which is equal to 1000 volts, and the current is 1 milliampere (mA), which is equal to 0.001 amperes.

Plugging these values into the formula:

[ P = 1000, \text{V} \times 0.001, \text{A} ]

[ P = 1, \text{W} ]

This calculation shows that the total power consumed by the device is 1 watt. Therefore, the choice indicating that the power is 1 watt is correct. Understanding this fundamental relationship between voltage, current, and power is essential for working with electrical devices, as it helps in diagnosing performance and ensuring proper device operation.