Question

The cost of electricity is 50 paise per unit. A heater is used for 2 hours daily for 20 days at 220V - 5 Amp. Calculate the
1. Resistance of the element of the heater.
2. Wattage of the heater.
3. Cost of the electric energy consumed.

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Answer 1

Answer:

The easiest question ever !!

Step-by-step explanation:

Solution :-

1. We know that

${\bold{\sf{⟼ \: \: \: \: \: R \: = \: \frac{V}{I} \: = \: \frac{220}{5} \: = \: 44}}}$

2. Wattage = Voltage × Current

220 × 5

1100 watts

${\bold{\sf{⟼ \: \: \: \: \: Wattage \: = \: \frac{1100 × 2 × 20}{1000}}}}$

${\bold{\sf{⟼ \: \: \: \: \: Wattage \: = \: 44 units}}}$

3. Cost = 50 × 44 = Rs. 22