InterviewSolution
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InterviewSolution
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Two bulbs each of 60 W and 80 W power are used for (1/4)th a day and (1/2) a day, respectively. Write the following steps in a sequential order to find the total number of units consumed by them when they are used for 30 days. (a) Now, multiply E with 30, to get the energy consumed by them in 30 days. (b) Find the electric energy consumed by each bulb in a day using `E_(1)=P_(1)t_(1)` and `E_(2)=P_(2)t_(2)`. (c) Note down the powers of the bulbs and the time for which they are used per day as `P_(1), P_(2)` and `t_(1)`, `t_(2)` , respectively. (d) Convert the time into hours. (e) Find the total energy (E) consumed by them in one day, i.e., `E=E_(1)+E_(2)`. (f) Write the energy in terms of units, i.e., commercial unit of electric energy.A. c d b e a fB. c d e a b fC. c d a d e fD. c e a b d f |
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Answer» Correct Answer - A (i) Note down the powers of the bulbs and the time for which they are used per day as `P_(1), P_(2)` and `t_(1),t_(2)` respectively. (ii) Convert the time into hours. (iii) Find the electric energy consumed by each bulb in a day using `E_(1)=P_(1)t_(1)` and `E_(2)=P_(2)t_(2)` (iv) Find the total energy (E) consumed by them in one day, i.e., `E=E_(1)+E_(2)`. (v) Now, multiply E with 30, to get the energy consumed by them in 30 days. (vi) Write the energy in terms of units i.e. commercial unit of electric energy. |
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