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Physics CBSE Live product
Class 9 (2025-26)
Work and energy
Annual Revision IV - Work and energy
5.
Energy consumption
Question:
3
m.
Find the correct value:
An electric heater is rated
1050
\(W\).
How much energy does it use in
10
\(h\)?
The formula to calculate the energy consumed by an electric heater is
,
\(Energy\ consumed\ =\ \frac{Force}{Time\ taken}\)
\(Energy\ consumed\ =\ Power \times Time\ taken\)
\(Energy\ consumed\ =\ Work \times Time\ taken\)
\(Energy\ consumed\ =\ \frac{Power}{Time\ taken}\)
Energy consumed by the heater
\(=\)
\(kWh\)
[Note: Enter the answer upto 2 decimal places.]
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