Answer:
Energy use by bulb = 36 kJ
Explanation:
Power of bulb = 120 W
Time of working = 5 minutes =5 x 60 = 300 seconds.
Power = Work / Time
Work = Power x Time
= 120 x 300
= 36000 J = 36 kJ
So. energy use by bulb = 36 kJ
The energy consumed by the bulb in 5 minutes by the 120 w bulb is 36,000 J.
We know that the energy consumed by the bulb can be found using the formula of power consumed,
Given to us
Power consumed by the light bulb = 120 w
Time for which bulb was on = 5 minutes = 300 seconds
Substitute the values in the formula of power,
[tex]Power=\dfrac{Work}{Time}[/tex]
[tex]\rm 120 = \dfrac{Work}{300}\\\\Work = 36,000 J[/tex]
Hence, the energy consumed by the bulb in 5 minutes by the 120 w bulb is 36,000 J.
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