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What will be the energy used when a 500 W toaster is kept on for thirty minutes?

What will be the energy used when a 500 W toaster is kept on for thirty minutes? Correct Answer <span style="">900 kJ</span>

Concept:

Energy consumed for any electrical equipment is given by:

E = P × t

where E = Energy

P = Power 

t = Time

The energy is measured in either watt × sec or kW × hr.

The SI unit of energy is Joule.

Calculation:

Given P = 500 watt

t = 30 min = 1800 sec

E = 500 × 1800

E = 900000 J

E = 900 kJ

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