Question

How much power is produced if a voltage of `7 V` is applied to a circuit with a resistance of `98 Omega`?

Answer 1

The power is `=0.5W`

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=7V`

The resistance is `R=98 Omega`

The current is

`I=U/R=7/98=1/14A`

The power is

`P=7xx1/14=1/2=0.5W`