Question

An electric heater draws a current of 10 ampere from a 220 supply what is the cost of using the heater fibre per day for 30 days is the cost of 1 unit is rupees 2.50

Answer 1

Explanation:

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Answer 2

Answer :-

₹ 3,960

Given:-

I = 10A

V = 220v

1 unit = ₹2.50

Solution :-

FIrst we have to calculate the power of electric heater.

The formula for power is :-

$\boxed{\sf{P = V. I}}$

$P = 220 \times 10$

$P = 2200$

1 kw = 1000w

$P = \dfrac{2200}{1000}$

$P = 2.2 kw$

Now, electrical energy consumed is given by :-

$\boxed{\sf{ E = P. T. N }}$

where, n is no. of days

$E = 2.2 \times 24 \times 30$

$E = 1584 kwh$

we know that,

1 kwh = 1 unit

1 unit cost = ₹ 2.50

$therefore$ Cost = 1584 × 2.50

= ₹ 3,960