NCERT Solutions for Class 9 Science Chapter 11
Important NCERT Questions
Work and Energy
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-156
Questions No-3
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
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To calculate the power of the lamp, we can use the formula for power:
P = Energy/Time
Given:
– Electrical energy consumed by the lamp = 1000 joules (J)
– Time taken = 10 seconds (s)
We’ll use these values in the formula to find the power (P) of the lamp:
P = 1000J/10 s
P = 100 W
Therefore, the power of the lamp is 100 watts (W).