Asked: R.A.S./R.T.S. (Pre) 2012medium Level
QUESTION STATEMENT:द्विभाषी / Bilingual
एक 100 वॉट का बिजली का बल्ब 10 घंटे जलता है, तो 5 रु. प्रति यूनिट की दर से विद्युत खर्च होगा-
If a 100-watt electric bulb is lighted for 10 hours, what will be the electricity expenditure at the rate of Rs. 5 per unit?
SELECT CORRECT OPTION:
A
5 रु.
Rs. 5
Correct
B
10 रु.
Rs. 10
C
25 रु.
Rs. 25
D
50 रु.
Rs. 50
Official Solution & Explanation:
Correct Answer: Option A(5 रु.)
व्यय ऊर्जा $= \frac{\text{वॉट} \times \text{घंटे}}{1000} = \frac{100 \times 10}{1000} = 1\text{ किलोवॉट घंटा} = 1\text{ यूनिट}$।
विद्युत का कुल मूल्य $= 1 \times 5 = 5\text{ रु.}$।
Energy consumed $= \frac{100 \times 10}{1000} = 1\text{ kWh} = 1\text{ unit}$. Total cost $= 1 \times \text{Rs. } 5 = \text{Rs. } 5$.
Subject: General Science•Topic: Electric Current•Subtopic: Electric Current
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