Question

If the resistance of a heater is 50ohm and is connected to the main wire having voltage 220v. How much current will flow through it.

Answer 1

$Power = VI$

$Power= {I}^{2}R$

$So, \: VI= {I}^{2} R \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: VI= {I}^{2} R \\ = > 220 \times I = {I}^{2} \times 50 \\ = > \: \: \: \: \: \: \: \: \: \frac{ {I}^{2} }{I} = \frac{220}{50} \\ = > \: \: \: \: \: \: \: \: \: \: \: \: I = 4.4 \: A$

$So, \: the \: current \: flowing \: through \: it \: is \: 4.4 \: A$

Answer 2

Given

Potential difference V = 220 V

Resistance of heater R = 50Ω

To determine the current flowing I =?

We know from ohms law,

V = I R

I = V/R = 220/50

I = 4.4 Ampere.