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

Aug 11, 2018

The power is $= 0.5 W$

#### Explanation:

The power is

$\text{Power (W) "="Voltage (V) " xx" Current (A)}$

$P = U I$

And

Ohm's Law is

$\text{Voltage (V)"= " Current (A) " xx " Resistance } \left(\Omega\right)$

$U = R I$

The voltage is $U = 7 V$

The resistance is $R = 98 \Omega$

The current is

$I = \frac{U}{R} = \frac{7}{98} = \frac{1}{14} A$

The power is

$P = 7 \times \frac{1}{14} = \frac{1}{2} = 0.5 W$