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Vadim26 [7]
3 years ago
12

What is the energy efficiency of a light bulb that gives you 30 units of usable energy for every 100 units of energy put in to i

t?
a. 0.3
b. 3
c. 30
Chemistry
2 answers:
NeX [460]3 years ago
7 0

Answer:

Explanation:

Given parameters:

Energy output = 30units

Energy input = 100units

problem:

Energy efficiency of light bulb:

Solution:

 Efficiency is given as:

    Efficieny = \frac{energy_{output} }{energy_{input } x100

   Efficieny = \frac{30}{100} x 100 = 30%

 

vladimir2022 [97]3 years ago
6 0

Answer:

The correct answer is option a.

Explanation:

Efficiency is defined as the ratio of output energy to input energy.

Efficiency(e)=\frac{E_o}{E_i}

Energy given out by the system = E_o

Energy given to the system = E_i

Here we are given with : E_o-30 units,E_i=100

Efficiency of of a light bulb:

e=\frac{30 units}{100 units}=0.3

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