What is the efficiency when 120j is supplied to a toaster and 50J of energy is transferred into heat?

When 120J is supplied to a toaster and 50J of energy is transferred into heat, the efficiency of the toaster is 42%.

Given the following data:

To find the efficiency of the toaster:

Mathematically, the efficiency of an engine is calculated by using the formula:

Where:

Substituting the given parameters into the formula, we have;

Efficiency = 42%

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η = 58.3%

Explanation:

It has a total of 120 [J], and part of this energy is lost in Heat 50 [J], that is to say of those 120 [J] 120 - 50 = 70 [J] are used to prepare food.

Efficiency is characterized by being equal to the work done on the investment made.

Therefore the efficiency (η) is:

η = 70/120

η = 58.3%

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