Question

How much power is produced if a voltage of `2 V` is applied to a circuit with a resistance of `10 Omega`?

Answer 1

The power is `=0.4W`

Explanation:

The power is

`"Power (W) "="Voltage (V) " xx" Current (A)"`

`P=UI`

And

Ohm's Law is

`"Voltage (V)"= " Current (A) " xx " Resistance "( Omega)`

`U=RI`

The voltage is `U=2V`

The resistance is `R=10 Omega`

The current is

`I=U/R=2/10=0.2A`

The power is

`P=2xx0.2=0.4W`