The initial amount of electrical energy involved is 120 J
What is Electrical energy:
Here,
we have an initial amount of electrical energy, E.
E is converted into two forms of energy
given light energy, L = 20 J
and the Heat energy, H = 100 J
The law of conservation of energy states that energy cannot be created nor destroyed, but only converted into other forms.
According to The law of conservation of energy:
E = L + H
substituting the values, we get
E = 20 + 100
E = 120 J
So, option D is correct.
The initial amount of electrical energy involved is 120 J
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Your question is incomplete as the figure is missing, but most probably the question was:
How much electrical energy is involved in this transformation?
60 J
80 J
100 J
120 J
