An electric toaster draws $8 A$ current in a $220 V$ circuit. It is used for $2 h r$ . What is the cost of operating the toaster if the cost of electrical energy is $R s . 4.5 / k W h$ ?

R s . 9.50

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R s . 25.50

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R s . 14.84

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R s . 15.84

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Solution

The correct option is C $R s . 15.84$
Given,
$i = 8 A E = 220 v t = 2 h r$

Energy dissipated is given by:
$E = E i t$
$= 220 \times 8 \times 2 W h$
$= 3.52 k W h$
The cost per kWh is $R s . 4.50$
Hence, the cost of running the kettle for two hours is:
$3.52 \times 4.50 = R s . 15.84$

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An electric toaster draws 8 A current in a 220 V circuit. It is used for 2 hr. What is the cost of operating the toaster if the cost of electrical energy is Rs. 4.5/kWh?

The correct option is C Rs. 15.84Given,i=8 AE=220 vt=2 hrEnergy dissipated is given by:E=E i t =220×8×2 Wh =3.52 kWhThe cost per kWh is Rs. 4.50Hence, the cost of running the kettle for two hours is:3.52×4.50=Rs. 15.84

An electric toaster draws $8 A$ current in a $220 V$ circuit. It is used for $2 h r$ . What is the cost of operating the toaster if the cost of electrical energy is $R s . 4.5 / k W h$ ?

The correct option is C $R s . 15.84$
Given,
$i = 8 A E = 220 v t = 2 h r$

Energy dissipated is given by:
$E = E i t$
$= 220 \times 8 \times 2 W h$
$= 3.52 k W h$
The cost per kWh is $R s . 4.50$
Hence, the cost of running the kettle for two hours is:
$3.52 \times 4.50 = R s . 15.84$