Question

An electric heater is used on a 220 V supply and takes a current of 5a ,(a.) what is its power? ,(b.) what is the cost of using the heater for 50hour if 1kwhcost Rs.1.50?​

Answer 1

$\huge\mathfrak{Answer}$

$\bold{Given }$

$V = 220$

$I = 5 A$

$\huge\text{\underline{Solution}}$

Power is defined as the product of voltage at the end of a conductor and current flow through it.

$\boxed{P= V × I }$

$\boxed{P= 220 × 5}$

$\boxed{P= 1100 watt or 1.1 kw}$

$\boxed{\sf{ E = P × T }}$

$\implies$E = 1.1 × 50

$\implies$E= 55 Kwh

Given,

1 kwh cost ₹ 1.50

Then,

55 Kwh cost = 55 × 1.50

= ₹ 82.5